Functional Dyspepsia – Causes, Symptoms, Treatment

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.

Patient Mode

Understand this article easily

Switch between simple English and easy Bangla patient notes. This is for education and does not replace a doctor consultation.

Functional dyspepsia is one of the most common functional gastrointestinal disorders and affects more than 20% of the population.  There are three different subtypes: epigastric pain syndrome (EPS), postprandial distress syndrome (PDS), and overlapping PDS and EPS. Pathophysiology Although the exact mechanism is not well...

For severe symptoms, danger signs, pregnancy, child illness, or sudden worsening, seek urgent medical care.

বাংলা রোগী নোট এখনো যোগ করা হয়নি। পোস্ট এডিটরে “RX Bangla Patient Mode” বক্স থেকে সহজ বাংলা সারাংশ যোগ করুন।

এই তথ্য শিক্ষা ও সচেতনতার জন্য। এটি ডাক্তারি পরীক্ষা, রোগ নির্ণয় বা প্রেসক্রিপশনের বিকল্প নয়।

Article Summary

Functional dyspepsia is one of the most common functional gastrointestinal disorders and affects more than 20% of the population.  There are three different subtypes: epigastric pain syndrome (EPS), postprandial distress syndrome (PDS), and overlapping PDS and EPS. Pathophysiology Although the exact mechanism is not well understood, the pathophysiology of functional dyspepsia is complex. Several different mechanisms are thought to contribute to each subtype.[rx] Traditionally, functional dyspepsia has...

Key Takeaways

  • This article explains Pathophysiology in simple medical language.
  • This article explains Causes of Functional Dyspepsia in simple medical language.
  • This article explains  Symptoms Of Functional Dyspepsia in simple medical language.
  • This article explains Diagnosis of Functional Dyspepsia in simple medical language.
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.

Seek urgent medical care if you notice

These warning signs are general safety guidance. Local emergency numbers and clinical judgment should always come first.

  • Severe symptoms, breathing difficulty, fainting, confusion, or rapidly worsening illness.
  • New weakness, severe pain, high fever, or symptoms after a serious injury.
  • Any symptom that feels urgent, unusual, or unsafe for the patient.
1

Emergency now

Use emergency care for severe, sudden, rapidly worsening, or life-threatening symptoms.

2

See a doctor

Book a professional medical evaluation if symptoms persist, worsen, recur often, affect daily activities, or occur in a high-risk patient.

3

Learn safely

Use this article to understand possible causes, tests, treatment options, prevention, and questions to ask your clinician.

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.
Definition

Functional dyspepsia is one of the most common functional gastrointestinal disorders and affects more than 20% of the population.  There are three different subtypes:

  • epigastric pain syndrome (EPS),
  • postprandial distress syndrome (PDS), and
  • overlapping PDS and EPS.

Pathophysiology

Although the exact mechanism is not well understood, the pathophysiology of functional dyspepsia is complex. Several different mechanisms are thought to contribute to each subtype. Traditionally, functional dyspepsia has been attributed to disturbances in gastric physiologic factors divided into macroscopic and microscopic mechanisms. Macroscopic mechanisms include gastroesophageal reflux (GERD), delayed gastric emptying, and visceral hypersensitivity alterations in the nervous system. Microscopic mechanisms include impaired barrier function, altered sensitivity to duodenal acid or lipids, and gastroduodenal infection, or irritation, often causing pain, swelling, heat, or redness. সহজ বাংলা: শরীরের প্রদাহ; ব্যথা, ফোলা বা লালভাব হতে পারে।" data-rx-term="inflammation" data-rx-definition="Inflammation is the body’s response to injury, infection, or irritation, often causing pain, swelling, heat, or redness. সহজ বাংলা: শরীরের প্রদাহ; ব্যথা, ফোলা বা লালভাব হতে পারে।">inflammation. Additional mechanisms include environmental insults like food inducing gastroduodenal physiologic changes, infections causing infection, or irritation, often causing pain, swelling, heat, or redness. সহজ বাংলা: শরীরের প্রদাহ; ব্যথা, ফোলা বা লালভাব হতে পারে।" data-rx-term="inflammation" data-rx-definition="Inflammation is the body’s response to injury, infection, or irritation, often causing pain, swelling, heat, or redness. সহজ বাংলা: শরীরের প্রদাহ; ব্যথা, ফোলা বা লালভাব হতে পারে।">inflammation, and allergen exposure can lead to allergy, parasites, and some inflammation. সহজ বাংলা: অ্যালার্জি/পরজীবী সংক্রমণে জড়িত রক্তকণিকা।" data-rx-term="eosinophil" data-rx-definition="Eosinophil is a white blood cell involved in allergy, parasites, and some inflammation. সহজ বাংলা: অ্যালার্জি/পরজীবী সংক্রমণে জড়িত রক্তকণিকা।">eosinophil recruitment in genetically predisposed patients. Psychological factors like anxiety and depression can cause a negative stimulus to the brain-gut axis, suggesting that there is central processing of visceral stimuli from sensations in the gastrointestinal tract.

Causes of Functional Dyspepsia

The etiology of functional dyspepsia is likely multifactorial; however, the exact cause is not clearly understood.  Several risk factors have been seen to be associated with the condition.

  • Enteric infections: H. pylori, Escherichia coli O157, Campylobacter jejuni, and Salmonella.
  • Recent bacterial infections. সহজ বাংলা: ব্যাকটেরিয়ার সংক্রমণের ওষুধ।" data-rx-term="antibiotic" data-rx-definition="An antibiotic is a medicine used to treat bacterial infections. সহজ বাংলা: ব্যাকটেরিয়ার সংক্রমণের ওষুধ।">antibiotic use
  • Use of non-steroidal infection, or irritation, often causing pain, swelling, heat, or redness. সহজ বাংলা: শরীরের প্রদাহ; ব্যথা, ফোলা বা লালভাব হতে পারে।" data-rx-term="inflammation" data-rx-definition="Inflammation is the body’s response to injury, infection, or irritation, often causing pain, swelling, heat, or redness. সহজ বাংলা: শরীরের প্রদাহ; ব্যথা, ফোলা বা লালভাব হতে পারে।">inflammation, pain, or swelling. সহজ বাংলা: প্রদাহ/ফোলা/ব্যথা কমায়।" data-rx-term="anti-inflammatory" data-rx-definition="Anti-inflammatory means reducing inflammation, pain, or swelling. সহজ বাংলা: প্রদাহ/ফোলা/ব্যথা কমায়।">anti-inflammatory drugs
  • Being overweight
  • Smoking
  • Psychosocial dysfunction
Medications
Diseases

 Symptoms Of Functional Dyspepsia

Diagnosis of Functional Dyspepsia

Functional dyspepsia is diagnosed based on the Rome IV criteria.  It is defined by the presence of one or more of the following symptoms: epigastric pain or burning, early satiety, and postprandial fullness in the absence of structural disease using imaging or endoscopy. First, patients should be tested and treated for Helicobacter pylori (H. pylori) if they are less than 60 years of age. Then, further treatment consists of symptom management with proton pump inhibitors (PPI), H2 receptor antagonists (H2RA), prokinetic agents, and even antidepressants. Alarms symptoms such as weight loss, dysphagia, or vomiting, or if greater than age 60, warrant an endoscopic evaluation.

History and Physical
  • Typical symptoms can be divided into the subtypes PDS and EPS, and there exists an overlap between the two syndromes. These symptoms can be acute or chronic. PDS patients report loss of appetite, early satiation, nausea, retching, vomiting, and bloating.
  • In EPS, patients have stomach cramping and other upper abdominal pain. Some symptoms are non-gastrointestinal. Patients often report associated diaphoresis, headache, sleep disorders, and irritable bladder.
  • Functional dyspepsia symptoms usually do not progress and lack red flag signs of unintentional weight loss, dysphagia, night sweats, and persistent vomiting. Patients usually have an unremarkable physical exam, and this can assist in excluding other diagnoses.
Evaluation

The American College of Gastroenterology (ACG) recommends the routine use of upper endoscopy in patients older than 60 years to rule out malignancy, especially in the setting of red flag signs. If patients do not respond to treatment, it is reasonable to pursue more specialized testing specific to the symptoms.

In addition to a physical exam and questions about your symptoms, a doctor may perform the following tests. To exclude organic causes, evaluation can start with laboratory tests, including blood count, complete metabolic panel, thyroid function, and inflammatory markers.

Treatment of Functional Dyspepsia

Treatment can be challenging, where the main aim is symptom control. Initial management begins with an explanation of the diagnosis and discussing the patient’s expectations for treatment. If it is suspected, H. pylori eradication is recommended as the first treatment for all patients with functional dyspepsia, as this improves symptoms and decreases the risk of peptic ulcers and gastric cancer. After this, treatment is a two-step process.

  • The first-line treatment is with a proton pump inhibitor or H2 receptor antagonist for at least four weeks.
  • Antacids –These counter the effects of stomach acid. Examples include Alka-Seltzer, Maalox, Rolaids, Riopan, and Mylanta. These are over-the-counter (OTC) medicines that do not need a prescription. A doctor will usually recommend an antacid medication as one of the first treatments for dyspepsia.
  • H-2-receptor antagonists–These reduce stomach acid levels and last longer than antacids. However, antacids act more quickly. Some of these are OTC, while others are only available on prescription. Some people may experience nausea, vomiting, constipation, and headaches after taking these. Other side effects may include bruising or bleeding.
  • Proton pump inhibitors (PPIs) – Examples include Aciphex, Nexium, Prevacid, Prilosec, Protonix, and Zegerid. PPIs are highly effective for people who also have gastroesophageal reflux disease (GERD). They reduce stomach acid and are stronger than H-2-receptor antagonists.
  • Prokinetics – This medication is helpful for stomachs that empty slowly. One example of a prokinetic drug is Reglan. Side effects may include tiredness, depression, sleepiness, anxiety, and muscle spasms.
  • Antibiotics –  If H. pylori is causing peptic ulcers that result in indigestion, an antibiotic will be prescribed. Side effects may include an upset stomach, diarrhea, and fungal infections.
  • Antidepressants – If the doctor finds no causes for indigestion after a thorough evaluation, and the person with dyspepsia has not responded to treatments, the doctor may prescribe low-dose antidepressants.
  • Antidepressants sometimes ease discomfort by reducing the sensation of pain. Side effects may include nausea, headaches, agitation, constipation, and night sweats.
  • Psychological therapy – For people with functional dyspepsia, psychological therapy can help manage the cognitive aspects of indigestion. Cognitive-behavioral therapy, biofeedback, hypnotherapy, and relaxation therapy may be recommended.

Then, if symptoms persist, subsequent treatment with tricyclic antidepressants, or prokinetic agents like metoclopramide and acotiamide (not available in the U.S.) are pursued. Adjunctive or alternative non-pharmacologic therapies include psychotherapy, herbal supplementation, lifestyle modification, dietary interventions, acupuncture, and electrical stimulation.

References

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: Functional Dyspepsia – Causes, Symptoms, Treatment

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.

RX Patient Help

Ask a health question safely

Write your symptom story. A health professional or site editor can review it before any answer is prepared. This box is not for emergency care.

Emergency first: Severe chest pain, breathing trouble, unconsciousness, stroke signs, severe injury, heavy bleeding, or rapidly worsening symptoms need urgent local medical care now.

Frequently Asked Questions

Is this article a replacement for a doctor?

No. It is educational content only. Patients should consult a qualified clinician for diagnosis and treatment.

When should I seek urgent care?

Seek urgent care for severe symptoms, rapidly worsening condition, breathing difficulty, severe pain, neurological changes, or any emergency warning sign.

References

Add references, clinical guidelines, textbooks, journal articles, or trusted medical sources here. You can edit this area from the RX Article Professional Blocks panel.

More from this topic
  1. Isolated Congenital Elbow Dislocation

    DefinitionIsolated congenital? elbow dislocation is a very rare condition present from birth. In most medical papers, the more exact name is congenital? radial head dislocation, because...

    April 2, 2026 • Gastrointestinal, Pelvic & Liver Disease, (A - Z)
  2. Alacrimia-Choreoathetosis-Liver Dysfunction Syndrome

    DefinitionAlacrimia-choreoathetosis-liver dysfunction syndrome is a very rare inherited disease. It is now usually called NGLY1 deficiency or NGLY1-related congenital? disorder of deglycosylation. In this condition, the...

    April 1, 2026 • Gastrointestinal, Pelvic & Liver Disease, (A - Z)
  3. Congenital Diarrhea Caused by Mutation in DGAT1

    DefinitionCongenital? diarrhea? caused by mutation in DGAT1 is a very rare inherited disease. It usually starts in the newborn period or in early infancy. The baby...

    April 1, 2026 • Gastrointestinal, Pelvic & Liver Disease, (A - Z)
  4. Congenital Chronic Diarrhea with Protein-Losing Enteropathy

    DefinitionCongenital? chronic? diarrhea? with protein-losing enteropathy is not usually one single disease name. It is a clinical description for a baby or young child who has...

    April 1, 2026 • Gastrointestinal, Pelvic & Liver Disease, (A - Z)
  5. Congenital Chronic Diarrhea with Exudative Enteropathy

    DefinitionCongenital? chronic? diarrhea? with exudative enteropathy is a rare inherited early-life intestinal disease in which the gut does not handle nutrients, fluids, and proteins normally, so...

    April 1, 2026 • Gastrointestinal, Pelvic & Liver Disease, (A - Z)
  6. Congenital Diarrhea 7 with Exudative Enteropathy

    DefinitionCongenital? diarrhea? 7 with exudative enteropathy is a very rare inherited intestinal disease. It usually starts in the newborn period or early infancy. The baby has...

    March 31, 2026 • Gastrointestinal, Pelvic & Liver Disease, (A - Z)
  7. Chronic Infantile Diarrhea Due to Guanylate Cyclase 2C Overactivity

    DefinitionChronic? infantile diarrhea? due to guanylate cyclase 2C overactivity is a very rare inherited bowel disease. It usually starts very early in life, often in infancy,...

    March 31, 2026 • Gastrointestinal, Pelvic & Liver Disease, (A - Z)
  8. Tufting Enteropathy

    DefinitionTufting enteropathy is a very rare inherited bowel disease. It usually starts in the first days, weeks, or months of life. The baby has severe watery...

    March 31, 2026 • Gastrointestinal, Pelvic & Liver Disease, (A - Z)
  9. Secretory Diarrhea Caused by Mutation in EPCAM

    DefinitionSecretory diarrhea? caused by mutation in EPCAM is usually called congenital? tufting enteropathy or intestinal epithelial dysplasia. It is a very rare inherited disease that starts...

    March 31, 2026 • Gastrointestinal, Pelvic & Liver Disease, (A - Z)
  10. Intestinal Epithelial Dysplasia

    DefinitionIntestinal epithelial dysplasia, also called tufting enteropathy or congenital? tufting enteropathy, is a very rare inherited disease of the gut lining. In this condition, the cells...

    March 31, 2026 • Gastrointestinal, Pelvic & Liver Disease, (A - Z)