Swimming Pool Granuloma

Last updated: February 8, 2026Reviewed date: February 8, 2026Reading time: 7 min read
Patient Tools

Read, save, and share this guide

Use these quick tools to make this medical article easier to read, print, save, or share with a family member.

On this page4 sections

Article Summary

Swimming pool granuloma is a skin infection caused by the bacterium Mycobacterium marinum. While it's not a common ailment, understanding its types, causes, symptoms, diagnostic tests, treatments, and relevant medications can be crucial. In this guide, we break down the complexities into easy-to-understand language to enhance accessibility. Types of Swimming Pool Granuloma: There is one primary type of swimming pool granuloma caused by Mycobacterium marinum....

Key Takeaways

  • This article explains Causes of Swimming Pool Granuloma: in simple medical language.
  • This article explains Symptoms of Swimming Pool Granuloma: in simple medical language.
  • This article explains Diagnostic Tests for Swimming Pool Granuloma: in simple medical language.
  • This article explains Treatments for Swimming Pool Granuloma: in simple medical language.
Before reading

RX Patient Tools

Use these quick guides before reading the article, or return to them when you need help preparing questions for a doctor.

Start here Choose the right pathway for symptoms, reports, medicines, or urgent warning signs. Disease article roadmap Read this topic step by step: meaning, symptoms, warning signs, diagnosis, treatment, prevention, and follow-up. Treatment planner Prepare questions about treatment choices, benefits, risks, side effects, and follow-up. Family & caregiver guide Organize symptoms, reports, medicines, questions, and follow-up safely. Nutrition & diet guide Prepare food, hydration, supplement, and medicine-timing questions safely. Prevention guide Organize risk factors, protective habits, screening, and warning signs. Recovery guide Prepare a safe plan for activity, rehabilitation, warning signs, and follow-up.
Educational health guideWritten for patient understanding and clinical awareness.
Reviewed content workflowUse writer and reviewer profiles for stronger trust.
Emergency safety firstUrgent warning signs are highlighted below.
Definition

Swimming pool granuloma is a skin caused by the bacterium Mycobacterium marinum. While it’s not a common ailment, understanding its types, causes, symptoms, diagnostic tests, treatments, and relevant medications can be crucial. In this guide, we break down the complexities into easy-to-understand language to enhance accessibility.

Types of Swimming Pool Granuloma:

There is one primary type of swimming pool granuloma caused by Mycobacterium marinum.

Causes of Swimming Pool Granuloma:

  1. Contaminated Water: The bacterium thrives in water, especially if it’s not adequately chlorinated.
  2. Skin Abrasions: Open wounds or cuts provide an entry point for the bacteria.
  3. Weakened Immune System: Individuals with compromised are more susceptible.
  4. Aquarium Exposure: Handling infected fish or aquarium water can lead to infection.
  5. Inadequate Pool Hygiene: Pools with poor maintenance become breeding grounds for bacteria.
  6. Occupational Exposure: Certain jobs, like fish farming or cleaning aquariums, may increase the risk.
  7. Tropical Environments: Warmer climates facilitate growth.
  8. : Any injury that breaks the skin can introduce the bacteria.
  9. Outdoor Activities: Engaging in water sports or activities in contaminated water sources.
  10. Fish Bites or Scratches: Fish carrying the bacteria may cause infection through bites or scratches.
  11. Contaminated Objects: Sharing towels, razors, or other personal items with an infected person.
  12. Chemical Exposure: Harsh chemicals in pools may irritate the skin, making it more susceptible.
  13. Underlying Skin Conditions: Pre-existing skin problems may increase vulnerability.
  14. Poor Personal Hygiene: Inadequate handwashing and general hygiene practices.
  15. Age Factor: Children and older adults may be more prone to infection.
  16. Sports Participation: Certain sports involve skin-to-skin contact, increasing the risk.
  17. Cuts from Plants: Injury caused by sharp plants in or around water.
  18. Lack of Protective Footwear: Walking barefoot in contaminated areas.
  19. Insect Bites: Scratching bites may introduce bacteria into the skin.
  20. Non-Sterile Piercings: Infected water can complicate healing for new piercings.

Symptoms of Swimming Pool Granuloma:

  1. Reddish Bumps: Small, raised bumps that may be red or purple.
  2. : The infected area can become swollen and tender.
  3. or Discomfort: The skin around the infection site may be painful.
  4. Ulceration: Bumps can develop into open sores or ulcers.
  5. Nodules: Firm, raised lumps under the skin.
  6. Draining : Infected areas may release a discharge.
  7. Joint Pain: In cases, joints near the infection may ache.
  8. Limited Mobility: Difficulty moving joints due to .
  9. : Changes in skin color around the infected area.
  10. : In some cases, a low-grade fever may accompany the infection.
  11. : Feeling cold or shivering despite normal temperatures.
  12. : General tiredness or lack of energy.
  13. Malaise: A feeling of overall discomfort or unease.
  14. : Persistent headaches unrelated to other factors.
  15. : Unexplained weight loss in severe cases.
  16. Swelling: Nearby may become enlarged.
  17. : Aching or sore muscles near the infection.
  18. Joint : Difficulty moving joints due to stiffness.
  19. Increased Sensitivity: The infected area may be more sensitive to touch.
  20. Skin Cracking: Dry, cracked skin around the affected site.

Diagnostic Tests for Swimming Pool Granuloma:

  1. Skin : A small sample of skin is taken for examination under a microscope.
  2. Culture Test: Testing a sample of the infected tissue to grow and identify the bacteria.
  3. PCR Test: Polymerase chain reaction detects the DNA of the bacteria.
  4. Blood Tests: Looking for specific antibodies or an elevated .
  5. X-rays: To check for joint involvement or bone damage.
  6. : Imaging to visualize soft tissues and joint structures.
  7. : Detailed imaging to assess the extent of infection.
  8. : for a more comprehensive view of affected areas.
  9. Aspiration: Draining fluid from an infected joint for analysis.
  10. Skin Scraping: Scraping the infected area to examine under a microscope.
  11. Immunohistochemistry: Using antibodies to detect specific proteins in tissues.
  12. Tissue Staining: Applying dyes to highlight specific structures during microscopic examination.
  13. C-reactive Protein Test: Blood test indicating inflammation in the body.
  14. Erythrocyte Sedimentation Rate (): Another blood test measuring inflammation.
  15. Joint Fluid Analysis: Examining fluid extracted from an infected joint.
  16. (): Assessing various blood components for abnormalities.
  17. Skin Swab: Collecting a swab from the infected area for bacterial analysis.
  18. Skin Patch Test: Applying potential allergens to the skin to check for reactions.
  19. Serum Chemistry: Blood test assessing various chemical components for abnormalities.
  20. Skin Sensitivity Test: Determining the skin’s response to specific substances.

Treatments for Swimming Pool Granuloma:

  1. Antibiotics: Prescribed to eradicate the bacterial infection.
  2. Topical Antibiotics: Creams or ointments for localized infections.
  3. Pain Relief Medications: Over-the-counter or prescription pain relievers.
  4. Anti-Inflammatory Drugs: To reduce swelling and inflammation.
  5. Wound Care: Keeping the infected area clean and covered.
  6. Hot Compresses: Applying warm compresses to promote drainage and healing.
  7. Elevating the Affected Limb: Minimizing swelling by keeping the limb elevated.
  8. Rest and Immobilization: Allowing affected joints or limbs to rest for healing.
  9. Surgical Drainage: Removing accumulated pus from deep lesions.
  10. Physical Therapy: Restoring mobility and function after the infection resolves.
  11. Cryotherapy: Freezing the affected tissue to remove lesions.
  12. Laser Therapy: Using lasers to target and destroy infected tissue.
  13. Intralesional Corticosteroid Injection: Administering steroids directly into the lesions.
  14. Synovectomy: Surgical removal of the infected joint lining.
  15. Debridement: Removing dead or infected tissue through surgery.
  16. Occupational Therapy: Helping individuals adapt to daily activities during recovery.
  17. Compression Bandages: Applying pressure to reduce swelling.
  18. Joint Aspiration: Removing fluid from an infected joint to relieve pressure.
  19. Hydrotherapy: Using water for therapeutic purposes in rehabilitation.
  20. Pulse Dye Laser Therapy: Targeting blood vessels to reduce lesions.
  21. UV Light Therapy: Exposing the infected area to ultraviolet light for healing.
  22. Electrosurgery: Using electrical currents to cut or coagulate tissue.
  23. Antifungal Medications: If a secondary fungal infection occurs.
  24. Immune-Boosting Supplements: Enhancing the body’s natural defenses.
  25. Moisturizers: Preventing dryness and cracking in the affected skin.
  26. Corticosteroid Creams: Managing inflammation and itching.
  27. Pain Management Techniques: Relaxation, meditation, or distraction techniques.
  28. Proper Hygiene Practices: Preventing secondary infections.
  29. Avoiding Irritants: Steer clear of substances that may aggravate the skin.
  30. Regular Follow-ups: Monitoring progress and adjusting treatment as needed.

Drugs for Swimming Pool Granuloma:

  1. Clarithromycin: Antibiotic targeting Mycobacterium marinum.
  2. Azithromycin: Another antibiotic effective against the bacteria.
  3. Doxycycline: Broad-spectrum antibiotic used in treating bacterial infections.
  4. Ciprofloxacin: Effective against various bacterial infections.
  5. Levofloxacin: An antibiotic used for more severe cases.
  6. Isoniazid: Sometimes used in combination therapy.
  7. Rifampin: Often combined with other antibiotics for enhanced efficacy.
  8. Trimethoprim-sulfamethoxazole: A combination antibiotic.
  9. Itraconazole: Antifungal medication for potential secondary infections.
  10. Fluconazole: Another antifungal option.
  11. Acetaminophen: Over-the-counter pain reliever.
  12. Ibuprofen: Nonsteroidal anti-inflammatory drug (NSAID).
  13. Naproxen: Another NSAID option for pain and inflammation.
  14. Corticosteroid Creams: Topical application for localized inflammation.
  15. Tacrolimus Ointment: Immune-modulating ointment for certain cases.
  16. Mupirocin: Topical antibiotic for skin infections.
  17. Gentamicin Cream: Topical treatment for bacterial skin infections.
  18. Diclofenac Gel: Topical NSAID for pain relief.
  19. Prednisone: Systemic corticosteroid for severe inflammation.
  20. Colchicine: Sometimes used for joint-related symptoms.

 

Disclaimer: Each person’s journey is unique, always seek the advice of a medical professional before trying any treatments to ensure to find the best plan for you. This guide is for general information and educational purposes only. If you or someone are suffering from this disease condition bookmark this page or share with someone who might find it useful! Boost your knowledge and stay ahead in your health journey. Thank you for giving your valuable time to read the article.

  1. https://medlineplus.gov/skinconditions.html
  2. https://www.aad.org/about/burden-of-skin-disease
  3. https://www.usa.gov/federal-agencies/national-institute-of-arthritis-musculoskeletal-and-skin-diseases
  4. https://www.cdc.gov/niosh/topics/skin/default.html
  5. https://www.skincancer.org/
  6. https://illnesshacker.com/
  7. https://endinglines.com/
  8. https://www.jaad.org/
  9. https://www.psoriasis.org/about-psoriasis/
  10. https://books.google.com/books?
  11. https://www.niams.nih.gov/health-topics/skin-diseases
  12. https://cms.centerwatch.com/directories/1067-fda-approved-drugs/topic/292-skin-infections-disorders
  13. https://www.fda.gov/files/drugs/published/Acute-Bacterial-Skin-and-Skin-Structure-Infections—Developing-Drugs-for-Treatment.pdf
  14. https://dermnetnz.org/topics
  15. https://www.aaaai.org/conditions-treatments/allergies/skin-allergy
  16. https://www.sciencedirect.com/topics/medicine-and-dentistry/occupational-skin-disease
  17. https://aafa.org/allergies/allergy-symptoms/skin-allergies/
  18. https://www.nibib.nih.gov/
  19. https://rxharun.com/resources/category/resources/rxharun/article-types/skin-care-beauty/skin-diseases-types-symptoms-treatment/
  20. https://www.nei.nih.gov/
  21. https://en.wikipedia.org/wiki/List_of_skin_conditions
  22. https://en.wikipedia.org/?title=List_of_skin_diseases&redirect=no
  23. https://en.wikipedia.org/wiki/Skin_condition
  24. https://oxfordtreatment.com/
  25. https://www.nidcd.nih.gov/health/
  26. https://consumer.ftc.gov/articles/w
  27. https://www.nccih.nih.gov/health
  28. https://catalog.ninds.nih.gov/
  29. https://www.aarda.org/diseaselist/
  30. https://www.ninds.nih.gov/Disorders/Patient-Caregiver-Education/Fact-Sheets
  31. https://www.nibib.nih.gov/
  32. https://www.nia.nih.gov/health/topics
  33. https://www.nichd.nih.gov/
  34. https://www.nimh.nih.gov/health/topics
  35. https://www.nichd.nih.gov/
  36. https://www.niehs.nih.gov
  37. https://www.nimhd.nih.gov/
  38. https://www.nhlbi.nih.gov/health-topics
  39. https://obssr.od.nih.gov/
  40. https://www.nichd.nih.gov/health/topics
  41. https://rarediseases.info.nih.gov/diseases
  42. https://beta.rarediseases.info.nih.gov/diseases
  43. https://orwh.od.nih.gov/

More from this topic
  1. Distal Arthrogryposis Type 9

    DefinitionDistal arthrogryposis type 9 is an old name for congenital contractural arachnodactyly, often shortened to CCA. Many experts now prefer the name congenital contractural arachnodactyly because...

    March 30, 2026 • Rx Autoimmune, Genetic and Rare Diseases (A - Z)
  2. Beals-Hecht Syndrome

    DefinitionBeals-Hecht syndrome, also called congenital contractural arachnodactyly (CCA), is a rare inherited connective tissue disorder. It is usually caused by a change in the FBN2 gene,...

    March 30, 2026 • Rx Autoimmune, Genetic and Rare Diseases (A - Z)
  3. Congenital Contractural Arachnodactyly

    DefinitionCongenital contractural arachnodactyly is a rare genetic connective tissue disorder that mainly affects the bones, joints, muscles, ears, and body shape. “Congenital” means it is present...

    March 30, 2026 • Rx Autoimmune, Genetic and Rare Diseases (A - Z)
  4. Congenital Hypofibrinogenemia

    DefinitionCongenital hypofibrinogenemia is a rare blood problem that a person is born with. In this condition, the blood has a lower-than-normal level of a protein called...

    March 6, 2026 • Rx Autoimmune, Genetic and Rare Diseases (A - Z)
  5. Congenital Afibrinogenemia

    DefinitionCongenital afibrinogenemia is a rare inherited bleeding disorder where the body makes almost no fibrinogen, which is also called coagulation factor I. Fibrinogen is a protein...

    March 6, 2026 • Rx Autoimmune, Genetic and Rare Diseases (A - Z)
  6. Congenital Adrenal Insufficiency with 46, XY Sex Reversal OR 46,XY Disorder of Sex Development-Adrenal Insufficiency Due to CYP11A1 Deficiency

    DefinitionCongenital adrenal insufficiency with 46,XY sex reversal (also called 46,XY disorder of sex development with adrenal insufficiency due to CYP11A1 deficiency) is a rare genetic disease....

    March 6, 2026 • Rx Autoimmune, Genetic and Rare Diseases (A - Z)
  7. Congenital Adrenal Hyperplasia Due to Cytochrome P450 Oxidoreductase Deficiency

    DefinitionCongenital adrenal hyperplasia due to cytochrome P450 oxidoreductase deficiency is a rare inherited disease that affects how the body makes important steroid hormones such as cortisol,...

    March 6, 2026 • Rx Urology
  8. Complete Phocomelia of Upper Limb

    DefinitionComplete phocomelia of the upper limb is a birth problem where almost the whole arm is missing, and the hand is attached very close to the...

    March 5, 2026 • Rx Autoimmune, Genetic and Rare Diseases (A - Z)
  9. Congenital Absence of Upper Arm and Forearm with Hand Present

    DefinitionCongenital absence of the upper arm and forearm with the hand still present is a rare birth difference where the baby is born without the long...

    March 5, 2026 • Degenerative Bones, Joints, and Spine Care (A - Z)
  10. Femorotibiofibular Intercalary Transverse Meromelia

    DefinitionFemorotibiofibular intercalary transverse meromelia is a very rare birth problem where the middle parts of the thigh and leg bones are missing or very under-developed, but...

    March 5, 2026 • Degenerative Bones, Joints, and Spine Care (A - Z)
Doctor visit helper

Prepare before seeing a doctor

A simple rural-patient checklist to help you explain symptoms clearly, ask better questions, and avoid unsafe self-treatment.

Safety note: This is not a prescription or diagnosis. For severe symptoms, pregnancy danger signs, children with serious illness, chest pain, breathing difficulty, stroke-like weakness, or major injury, seek urgent care.

Which doctor may help?

Start with a registered doctor or the nearest qualified health center.

What to tell the doctor

  • Write when the problem started and how it changed.
  • Bring old prescriptions, investigation reports, and current medicines.
  • Write allergies, pregnancy status, diabetes, kidney/liver disease, and major past illnesses.
  • Bring one family member if the patient is weak, elderly, confused, or a child.

Questions to ask

  • What is the most likely cause of my symptoms?
  • Which danger signs mean I should go to hospital quickly?
  • Which tests are necessary now, and which can wait?
  • How should I take medicines safely and what side effects should I watch for?
  • When should I come for follow-up?

Tests to discuss

  • Vital signs: temperature, pulse, blood pressure, oxygen saturation
  • Basic physical examination by a clinician
  • CBC, urine test, blood sugar, or imaging only when clinically needed

Avoid these mistakes

  • Do not use antibiotics, steroid tablets/injections, or strong painkillers without proper medical advice.
  • Do not hide pregnancy, kidney disease, ulcer, allergy, or blood thinner use.
  • Do not delay emergency care when danger signs are present.

Medicine safety and first-aid guide

This section is for patient education only. It does not replace a doctor, pharmacist, or emergency care.

Safe first steps

  • Avoid heavy lifting, sudden bending, and prolonged bed rest.
  • Use comfortable posture and gentle movement as tolerated.
  • Discuss physiotherapy, X-ray, or MRI only when clinically needed.

OTC medicine safety

  • For mild back pain, pain-relief medicine may be discussed with a doctor or pharmacist.
  • Avoid repeated painkiller use if you have kidney disease, stomach ulcer, uncontrolled blood pressure, or are taking blood thinners.

Avoid these mistakes

  • Do not start antibiotics without a proper medical decision.
  • Do not use steroid tablets or injections casually for quick relief.
  • Do not delay emergency care because of home remedies.

Get urgent help if

  • Back pain with leg weakness, numbness around private area, loss of urine/stool control, fever, cancer history, or major injury needs urgent care.
Medicine names, dose, and timing must be decided by a qualified clinician or pharmacist after checking age, pregnancy, allergy, other diseases, and current medicines.

For rural patients and family caregivers

Patient health record and symptom diary

Write your symptoms, medicines already taken, test results, and questions before visiting a doctor. This note stays on your device unless you print or copy it.

Doctor to discuss: Medicine doctor / pediatrician for children / qualified clinician
Tests to discuss with doctor
  • Temperature chart and hydration assessment
  • CBC with platelet count if fever persists or dengue/other infection is possible
  • Urine test, malaria/dengue tests, chest evaluation, or blood culture only when clinically indicated
Questions to ask
  • What is the most likely cause of my symptoms?
  • Which warning signs mean I should go to emergency care?
  • Which tests are really needed now?
  • Which medicines are safe for my age, pregnancy status, allergy, kidney/liver/stomach condition, and current medicines?
  • Do I need antibiotics, or is this more likely viral?

Emergency warning signs such as chest pain, severe breathing difficulty, sudden weakness, confusion, severe dehydration, major injury, or loss of bladder/bowel control need urgent medical care. Do not wait for online information.

Safe pathway to proper treatment

Care roadmap for: Swimming Pool Granuloma

Use this simple roadmap to understand the next safe steps. It is educational and does not replace examination by a doctor.

Go to emergency care if you notice:
  • Severe or rapidly worsening symptoms
  • Breathing difficulty, chest pain, fainting, confusion, severe weakness, major injury, or severe dehydration
Doctor / service to discuss: Qualified healthcare provider; specialist depends on symptoms and examination.
  1. Step 1

    Check danger signs first

    If danger signs are present, seek emergency care and do not wait for online information.

  2. Step 2

    Record the symptom story

    Write when symptoms started, severity, medicines already taken, allergies, pregnancy status, and test results.

  3. Step 3

    Visit a qualified clinician

    A doctor, nurse, or qualified healthcare provider can examine you and decide which tests or treatment are needed.

  4. Step 4

    Do only useful tests

    Do tests after clinical assessment. Avoid unnecessary tests, random antibiotics, or repeated medicines without diagnosis.

  5. Step 5

    Follow up and return early if worse

    If symptoms worsen, new warning signs appear, or treatment is not helping, return for review quickly.

Rural patient practical tips
  • Take a written symptom diary and all previous prescriptions/test reports.
  • Do not hide medicines already taken, even herbal or over-the-counter medicines.
  • Ask which warning signs mean urgent referral to hospital.

This roadmap is for education. A real diagnosis and treatment plan requires history, examination, and clinical judgment.