Symptoms A-Z

Browse comprehensive, doctor-reviewed information on 27 health symptoms. Find possible causes, when to see a doctor, and recommended tests.

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Abdominal Pain

Abdominal pain can range from mild stomach aches to severe pain. The location and type of pain can help determine the ca...

Back Pain

Back pain is one of the most common reasons for doctor visits. It can result from muscle strain, disc problems, arthriti...

Bloating

Bloating is a feeling of fullness, tightness, or swelling in the abdomen. It is often caused by excess gas production, s...

Blurred Vision

Blurred vision is a loss of sharpness in eyesight, making objects appear out of focus and hazy. It can affect one or bot...

Chest Pain

Chest pain can feel like pressure, burning, tightness, or a sharp stabbing sensation. It has many possible causes, rangi...

Cough

A cough is the body's way of clearing the airways. It can be dry or productive (with mucus) and acute or chronic (lastin...

Dizziness

Dizziness can describe feeling faint, lightheaded, weak, or unsteady. It can be caused by inner ear problems, circulatio...

Ear Pain

Ear pain (otalgia) can be sharp, dull, or burning and may affect one or both ears. It is commonly caused by ear infectio...

Fatigue

Fatigue is a persistent feeling of tiredness or exhaustion that doesn't improve with rest. It can be caused by many cond...

Fever

A fever is a temporary increase in body temperature, often due to infection. It's a sign that the body is fighting somet...

Frequent Urination

Frequent urination (urinary frequency) is the need to urinate more often than usual. It can be a symptom of many conditi...

Hair Loss

Hair loss (alopecia) can affect just the scalp or the entire body. It can be temporary or permanent and may result from ...

Headache

Headaches are one of the most common pain conditions. They can range from mild tension headaches to severe migraines and...

Heart Palpitations

Heart palpitations are feelings that your heart is racing, fluttering, pounding, or skipping beats. They're usually harm...

Insomnia

Insomnia is a common sleep disorder that makes it hard to fall asleep, stay asleep, or causes early awakening. It can be...

Joint Pain

Joint pain can affect one or many joints and can be caused by arthritis, injury, or other conditions. It may be accompan...

Muscle Weakness

Muscle weakness is a lack of muscle strength that makes it difficult to move normally. True muscle weakness (as opposed ...

Nausea

Nausea is an uneasiness of the stomach that often precedes vomiting. It can be caused by many things including pregnancy...

Night Sweats

Night sweats are repeated episodes of excessive sweating during sleep that are severe enough to soak nightclothes or bed...

Numbness and Tingling

Numbness and tingling (paresthesia) are abnormal sensations that can occur anywhere in the body but are most commonly fe...

Runny Nose

A runny nose (rhinorrhea) is excess drainage from the nose, which may be thin and clear or thick and colored. It is comm...

Shortness of Breath

Shortness of breath (dyspnea) is the feeling that you can't get enough air. It can be caused by heart conditions, lung d...

Skin Rash

A skin rash is a change in the color or texture of the skin. Rashes can be caused by allergies, infections, autoimmune c...

Sore Throat

A sore throat is pain, scratchiness, or irritation of the throat that often worsens when swallowing. The most common cau...

Swelling

Swelling (edema) is the enlargement of organs, skin, or other body parts caused by a buildup of fluid in the tissues. It...

Unexplained Weight Loss

Unexplained weight loss is a noticeable drop in body weight that occurs even when the person is not trying to lose weigh...

Weight Gain

Unintentional weight gain occurs when you put on weight without increasing your food intake or decreasing your physical ...