Symptom
Abdominal Pain & Cramping
Pain perceived in the abdominal region originating from visceral, parietal peritoneal, or referred pain pathways. Visceral pain is dull and...
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Clinical Symptom Reference
Symptoms Directory A–Z
Search bodily symptoms, evaluate potential causes, understand red flags, and learn when symptoms require urgent medical care.
Symptom
Acid Reflux & Heartburn
Heartburn (pyrosis) is a substernal burning sensation radiating upwards toward the mouth, caused by retrograde flow of gastric acid and peps...
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Symptom
Bloating & Abdominal Distension
Abdominal bloating refers to a sensation of tightness, fullness, or visual distension in the belly caused by intestinal gas accumulation, de...
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Symptom
Blood in Stool (Hematochezia & Melena)
Rectal bleeding or blood in the stool indicates hemorrhage along the digestive tract. Bright red blood (hematochezia) typically arises from...
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Symptom
Blurred Vision (Loss of Visual Acuity)
Blurred vision is an impairment of visual clarity or sharpness where objects appear hazy, out of focus, or doubled. It can stem from refract...
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Symptom
Chest Pain or Discomfort
Chest pain is discomfort, pressure, aching, or squeezing felt anywhere between the neck and upper abdomen. It represents one of the most cri...
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Symptom
Chronic Fatigue & Weakness
Fatigue is a pervasive sense of tiredness, lack of energy, and physical or mental exhaustion that is not relieved by sleep or rest, distinct...
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Symptom
Chronic Persistent Cough
A cough that persists for 8 weeks or longer in adults (4 weeks in children). A defensive reflex triggered by irritation of cough receptors i...
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Symptom
Constipation & Irregular Bowel Movements
Constipation is characterized by infrequent bowel movements (fewer than 3 per week), difficulty or straining during defecation, hard or lump...
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Symptom
Difficulty Swallowing (Dysphagia)
Dysphagia refers to the sensation of food or liquids sticking, catching, or hesitating in the throat or esophagus during swallowing. It is c...
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Symptom
Dizziness, Vertigo & Lightheadedness
Dizziness encompasses true vertigo (rotational spinning sensation due to vestibular pathology), presyncope (feeling faint due to cerebral hy...
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Symptom
Ear Pain (Otalgia) & Ear Fullness
Otalgia is pain located in or around the ear. It may arise primarily from ear structures (external auditory canal, tympanic membrane, middle...
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Symptom
Eye Redness & Conjunctivitis
Red eye is caused by dilation of the superficial conjunctival and episcleral blood vessels. While commonly due to benign conjunctivitis, it...
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Symptom
Frequent Urination & Polyuria
Increased urinary frequency (voiding at abnormally brief intervals) or polyuria (daily urine output exceeding 3 Liters in adults). Driven by...
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Symptom
Hair Loss (Alopecia & Thinning)
Hair loss involves excessive shedding or thinning of scalp or body hair. It encompasses non-scarring forms such as androgenetic alopecia and...
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Symptom
Headache & Migraine Pain
Headache refers to pain or aching originating in the craniofacial structures sensitive to pain (dura mater, intracranial arteries, pericrani...
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Symptom
Heart Palpitations & Rapid Pulse
Palpitations are an uncomfortable awareness of the heartbeat, described as fluttering, pounding, racing, or skipping beats. May be benign or...
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Symptom
High Fever & Chills
Fever (pyrexia) is a controlled elevation of core body temperature above the normal circadian range (>38.0°C or 100.4°F) mediated by hypotha...
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Symptom
Insomnia & Sleep Disturbance
Insomnia is a sleep disorder characterized by persistent difficulty initiating sleep, maintaining sleep continuity, or experiencing non-rest...
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Symptom
Joint Pain & Morning Stiffness
Arthralgia and joint inflammation affecting synovial joints. Differentiated clinically into non-inflammatory (mechanical, worsening with act...
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Symptom
Lower Back Pain (Lumbago)
Pain, muscle tension, or stiffness localized below the costal margin and above the inferior gluteal folds, with or without leg pain (sciatic...
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Symptom
Memory Loss & Cognitive Brain Fog
Memory loss ranges from benign absentmindedness and stress-induced brain fog to progressive neurodegenerative mild cognitive impairment (MCI...
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Symptom
Nausea & Vomiting
Nausea is an unpleasant sensation of the urge to vomit, whereas vomiting (emesis) is the forceful oral expulsion of gastric contents trigger...
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Symptom
Numbness & Tingling (Paresthesia)
Paresthesia is an abnormal sensation of numbness, tingling, burning, or "pins and needles" arising from peripheral nerve compression, neurop...
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