iSymptom

Health library

Every guide on iSymptom, organized so you can find your way in. Start with a section below, or jump to a body system for a short reading list of the guides people use most.

Start here

Symptoms A to ZWhat a symptom could mean, the warning signs, and what helpsConditions A to ZPlain-English guides to diseases, diagnosis, treatment and outlookEmergency warning signsWhen to call 911, organized by body systemHow to check your symptomsA step-by-step method and a symptom diary templateMedication safetyReading labels, choosing a pain reliever, interactions and disposalTreatment optionsHow self-care, medicines, therapy and surgery compareMedical glossaryOver 100 medical terms explained in one or two sentencesSitemapEvery page on the site in one list

How the guides are organized

There are two kinds of guide. A symptom guide starts from what you feel ("I have side pain") and works through likely causes, red flags and home care. A condition guide starts from a diagnosis ("kidney stones") and explains how it works, how it is diagnosed and treated, and what to expect. Most symptom guides link to the conditions that cause them, and the other way around.

Every guide opens with a short answer and a triage box that sorts warning signs into four levels: call 911, see a doctor within a day or two, book a routine visit, or manage at home.

Reading lists by body system

Heart and circulation

Lungs and breathing

Infections, colds and flu

Brain and nerves

Mental health and sleep

Digestive system

Kidneys and urinary tract

Bones, joints and muscles

Skin, hair and nails

Hormones and metabolism

Women's and pregnancy health

Men's health

Eyes, ears, nose and throat

Children's health

Blood, immune system and allergy

Injuries and poisoning

Can't find your topic?

Search the site for a symptom, condition or medical term, or browse the full lists of symptoms and conditions. If a topic you need is missing, tell us through the contact page.