Erythema Annulare Centrifugum

Last updated: February 8, 2026Reviewed date: February 8, 2026Reading time: 6 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 page5 sections

Article Summary

Erythema Annulare Centrifugum (EAC) is a rare skin condition that causes red, ring-shaped rashes on the skin. In this article, we'll break down EAC in simple language to help you understand its types, causes, symptoms, diagnosis, treatments, and medications. Types of Erythema Annulare Centrifugum (EAC): Classic EAC: The most common form of EAC, characterized by red, ring-shaped rashes that expand outward. Atypical EAC: This type...

Key Takeaways

  • This article explains Causes of Erythema Annulare Centrifugum: in simple medical language.
  • This article explains Symptoms of Erythema Annulare Centrifugum: in simple medical language.
  • This article explains Diagnostic Tests for Erythema Annulare Centrifugum: in simple medical language.
  • This article explains Treatments for Erythema Annulare Centrifugum: 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

Annulare Centrifugum (EAC) is a rare skin condition that causes red, ring-shaped rashes on the skin. In this article, we’ll break down EAC in simple language to help you understand its types, causes, symptoms, , treatments, and medications.

Types of Erythema Annulare Centrifugum (EAC):

  1. Classic EAC: The most common form of EAC, characterized by red, ring-shaped rashes that expand outward.
  2. EAC: This type doesn’t follow the typical ring shape and can appear in various patterns.
  3. Persistent EAC: Rashes in this type last longer than the classic EAC.

Causes of Erythema Annulare Centrifugum:

  1. Unknown: The exact cause of EAC is often unclear, but it may be linked to immune system reactions.
  2. Infections: Some infections, like or , can trigger EAC.
  3. Medications: Certain medications, such as antibiotics or diuretics, can lead to EAC.
  4. Insect Bites: In rare cases, insect bites can cause EAC.
  5. Allergies: Allergic reactions to foods, plants, or chemicals may be a factor.
  6. Underlying Health Conditions: Conditions like cancer or diseases might be associated with EAC.
  7. Stress: Emotional stress may exacerbate EAC symptoms.
  8. Hormonal Changes: Hormonal fluctuations, such as in pregnancy, could play a role.
  9. Inflammatory Disorders: Conditions like or can be linked to EAC.
  10. Predisposition: Some individuals may have a genetic tendency to develop EAC.
  11. Exposure to Harsh Weather: Extreme cold or heat can trigger EAC in susceptible individuals.
  12. Pregnancy: Hormonal changes during pregnancy might lead to EAC.
  13. Vaccinations: Rarely, vaccines can trigger EAC as an immune response.
  14. Gastrointestinal Disorders: Conditions like Crohn’s disease have been associated with EAC.
  15. Sunlight: Overexposure to sunlight can exacerbate EAC symptoms.
  16. Exercise: Strenuous physical activity may worsen EAC in some cases.
  17. Nutritional Deficiencies: Lack of certain vitamins or minerals might contribute to EAC.
  18. Inflammatory Skin Diseases: Conditions like can trigger EAC.
  19. Food Sensitivities: Some people may develop EAC in response to specific foods.
  20. Hormone Therapy: Hormone replacement therapy can sometimes be a factor.

Symptoms of Erythema Annulare Centrifugum:

  1. Red, Ring-Shaped Rashes: The hallmark symptom, rashes that form circular or annular shapes.
  2. : The affected areas can be itchy or uncomfortable.
  3. Burning Sensation: Some individuals may experience a burning or stinging feeling.
  4. Enlarging Rings: The rings often grow slowly and expand over time.
  5. Raised Edges: The outer edges of the rings may be slightly raised.
  6. Pale Centers: The centers of the rings can become paler as they grow.
  7. Variable Sizes: The size of the rings can vary from small to several inches in diameter.
  8. Multiple Rings: Sometimes, several rings may appear on the skin at once.
  9. : EAC can come and go, with periods of clear skin in between.
  10. Fluctuating Intensity: The redness and itching can vary in intensity.

Diagnostic Tests for Erythema Annulare Centrifugum:

  1. Examination: A dermatologist can often diagnose EAC by visually inspecting the skin.
  2. Skin : A small sample of skin tissue may be taken and examined under a microscope.
  3. Blood Tests: These can help rule out underlying medical conditions.
  4. Patch Testing: To identify potential allergens that trigger EAC.
  5. KOH Prep: A test to check for fungal infections on the skin.
  6. Testing: Identifying specific allergens through skin or blood tests.
  7. Wood’s Lamp Examination: Used to detect fungal or infections.
  8. Skin Culture: To determine if a bacterial or is present.
  9. Immunological Tests: These can assess the immune system’s involvement.
  10. Phototesting: Evaluating the skin’s reaction to ultraviolet light.
  11. Skin Scraping: To examine for mites or parasites.
  12. Skin Allergen Challenge: Testing individual allergens on the skin.
  13. Patch Testing: Applying potential allergens to the skin and for reactions.
  14. Skin Prick Test: A quick way to identify allergic sensitivities.
  15. : Detailed examination of skin tissue under a microscope.
  16. Skin Swab: To detect bacterial or fungal infections.
  17. Immunofluorescence Studies: To assess immune system involvement.
  18. Tzanck Smear: A test to diagnose viral infections.
  19. Skin Reflectance Spectroscopy: Evaluating skin characteristics.
  20. Skin Allergy Panel: Comprehensive testing for various allergens.

Treatments for Erythema Annulare Centrifugum:

  1. Topical Corticosteroids: Creams or ointments to reduce and itching.
  2. Antihistamines: Oral medications to relieve itching and discomfort.
  3. Moisturizers: To keep the skin hydrated and reduce dryness.
  4. Calamine Lotion: Soothes itching and irritation.
  5. Emollients: Help maintain skin barrier function.
  6. Avoid Triggers: Identify and avoid triggers that worsen EAC.
  7. UV Therapy: Controlled exposure to ultraviolet light in a medical setting.
  8. Corticosteroids: Oral steroids in cases.
  9. Immune Modulators: Medications that modulate the immune response.
  10. Anti-Fungal Medications: If a fungal is present.
  11. Antibiotics: For bacterial infections that may accompany EAC.
  12. Topical Tacrolimus: An immunosuppressant cream.
  13. Phototherapy: Controlled exposure to specific wavelengths of light.
  14. Topical Calcineurin Inhibitors: For those who can’t tolerate steroids.
  15. Cryotherapy: Freezing therapy to reduce inflammation.
  16. Creams: Non-steroidal options.
  17. Coal Tar Preparations: For EAC.
  18. Topical Anesthetics: To relieve itching and .
  19. Oral Antifungal Medications: For severe fungal infections.
  20. Biologic Therapies: Advanced treatments for severe cases.

Medications for Erythema Annulare Centrifugum:

  1. Hydrocortisone: A topical .
  2. Prednisone: An oral corticosteroid.
  3. Clobetasol: A potent topical steroid.
  4. Diphenhydramine: An antihistamine for itching.
  5. Loratadine: Non-drowsy antihistamine.
  6. Emollient Creams: Moisturizing creams.
  7. Clotrimazole: Antifungal medication.
  8. Azithromycin: Antibiotic for bacterial infections.
  9. Tacrolimus: An immunosuppressant cream.
  10. Methotrexate: An immune-modulating medication.
  11. Psoralen: Used in combination with phototherapy.
  12. Coal Tar: Helps control inflammation.
  13. Adalimumab: A biologic therapy.
  14. Infliximab: Another biologic option.
  15. Etanercept: A biologic drug.
  16. Certolizumab: Biologic therapy.
  17. Ustekinumab: Biologic for specific cases.
  18. Apremilast: An oral immunosuppressant.
  19. Dapsone: Used in some cases.
  20. Colchicine: An anti-inflammatory medication.

Conclusion:

Erythema Annulare Centrifugum can be a challenging skin condition, but with the right diagnosis and treatment, many people can manage their symptoms effectively. If you suspect you have EAC or are experiencing unusual skin rashes, consult a dermatologist for a proper evaluation and personalized treatment plan. Remember that treatment options may vary depending on the severity and individual factors, so always follow your healthcare provider’s advice for the best outcome.

 

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

Amazon Best Seller
Bio-Oil Skincare Body Oil, Serum for Scars and Stretchmarks, Face Moisturizer Dry Skin, Non-Greasy, Dermatologist Recommended, Non-Comedogenic, For All Skin Types, with Vitamin A, E, 4.2 oz
Bio-Oil Skincare Body Oil, Serum for Scars and Stretchmarks, Face Moisturizer Dry Skin, Non-Greasy, Dermatologist Recommended, Non-Comedogenic, For All Skin Types, with Vitamin A, E, 4.2 oz
  • HELPS IMPROVES APPEARANCE OF SCARS AND STRETCH MARKS - Dermatologist recommended and clinically proven for scars, stretch marks, uneven skin tone and so much more
  • PACKED WITH NATUAL OILS - Vitamin E helps maintain healthy looking skin while natural Chamomile and Lavender Oil calm and soothe
  • LOCKS IN ESSENTIAL HYDRATION WITHOUT CLOGGING PORES - Bio-Oil Skincare Oil is a uniquely formulated, non-greasy body oil that hydrates skin and helps retain essential moisture
  • PLANET & ANIMAL FRIENDLY — Vegan friendly, paraben free, cruelty free, non-comedogenic, and 100% recyclable
  • FORMULATED FOR ALL SKIN TYPES - Helps soften skin for all types, tones, textures and safe for use on face and body and won't clog pores
$23.49 −$2.00 $21.49 Amazon Prime
Buy Now On Amazon.com Price incl. tax, excl. shipping

 

More from this topic
  1. Inherited Glutamine Synthetase Deficiency

    DefinitionInherited? glutamine synthetase deficiency, also called congenital? glutamine deficiency or GLUL-related glutamine synthetase deficiency, is an ultra-rare inherited metabolic disease caused by harmful changes in both...

    March 29, 2026 • Rx Blood, Metabolism, and Infectious Diseases (A - Z)
  2. Congenital Brain Dysgenesis Due to Glutamine Synthetase Deficiency

    DefinitionCongenital? brain dysgenesis due to glutamine synthetase deficiency is an ultra-rare inherited? neurometabolic disease. It is also called GLND, congenital glutamine deficiency, inherited glutamine synthetase deficiency,...

    March 29, 2026 • Rx Autoimmune, Genetic and Rare Diseases (A - Z)
  3. Amegakaryocytic Thrombocytopenia

    DefinitionAmegakaryocytic thrombocytopenia? is a rare blood disorder in which the bone marrow? has very few or no megakaryocytes. Megakaryocytes are the large bone marrow cells that...

    March 9, 2026 • Rx Blood Donation, Fundraising & Charitable Trust
  4. Complete Atrioventricular Canal

    DefinitionComplete atrioventricular canal is a serious heart problem that a baby is born with. In this condition there is a big hole in the center of...

    February 28, 2026 • Rx Autoimmune, Genetic and Rare Diseases (A - Z)
  5. Complement Receptor Deficiency

    DefinitionComplement receptor deficiency is a rare health problem where the body does not have enough working “complement receptors” on its immune cells, or these receptors do...

    February 27, 2026 • Rx Autoimmune, Genetic and Rare Diseases (A - Z)
  6. Complement Component Deficiency

    DefinitionComplement component deficiency is a health problem where one or more proteins of the “complement system” are missing or do not work properly. [1] The complement...

    February 27, 2026 • Rx Autoimmune, Genetic and Rare Diseases (A - Z)
  7. Complement Component 5 Deficiency

    DefinitionComplement component 5 deficiency (often shortened to C5 deficiency or C5D) is a rare problem of the immune system where the body does not have enough...

    February 27, 2026 • Rx Autoimmune, Genetic and Rare Diseases (A - Z)
  8. Classic Complement Early Component Deficiency Caused by Mutation in C3

    DefinitionClassic complement early component deficiency caused by mutation in C3 means that an important immune protein, called complement component 3 or C3, is missing or does...

    February 27, 2026 • Rx Autoimmune, Genetic and Rare Diseases (A - Z)
  9. C3 Complement Deficiency

    DefinitionC3 complement deficiency means that the blood has very low or almost no working C3 protein, which is one of the main “helper” proteins in the...

    February 27, 2026 • Rx Autoimmune, Genetic and Rare Diseases (A - Z)
  10. Complement Component 3 (C3) Deficiency

    DefinitionComplement component 3 (C3) deficiency is a health problem where the blood has very low or almost no C3 protein, which is a key part of...

    February 27, 2026 • Rx Autoimmune, Genetic and Rare Diseases (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: Doctor / qualified healthcare provider
Tests to discuss with doctor
  • Basic vital signs: temperature, pulse, blood pressure, oxygen level if needed
  • Relevant blood, urine, imaging, or specialist tests only after clinical assessment
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?

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: Erythema Annulare Centrifugum

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.