Diseases and Conditions

Find doctor-approved information about symptoms, causes, diagnosis, treatment and prevention of common diseases and conditions.

Filter By Alphabet
All conditions that start with the letter I
  • illustration of a blood vessel carrying blood cells

    Idiopathic Thrombocytopenic Purpura (ITP)

    Idiopathic thrombocytopenic purpura (ITP) is a bleeding disorder. When you have ITP, your immune system destroys the platelets in your…

  • Woman holding antacid tablet and glass of water

    Indigestion (Dyspepsia)

    Indigestion happens when your body has trouble digesting food. Anyone can get indigestion, either on occasion or as part of…

  • Infant Jaundice

    Infant jaundice is common. It can make your baby’s skin, eyes, and mouth turn yellow. While it may look odd,…

  • Couple meeting with doctor

    Infertility

    Infertility means a couple isn’t able to become pregnant after 1 year of having regular, unprotected sex. Infertility can affect…

  • An illustration of large and small intestines inside the body that are color coded where red represents inflammation

    Inflammatory Bowel Disease (IBD)

    Inflammatory bowel disease (IBD) is the name of a group of disorders that cause the intestines to become inflamed (red…

  • closeup of person cutting toenails

    Ingrown Toenails

    An ingrown toenail occurs when the side or corner of the nail curls down and digs into the skin of…

  • hand holding a lubrication spray can

    Inhalant Use

    Inhalant use is a form of substance use disorder that involves breathing in or sniffing household products on purpose to…

  • Tick with its head sticking in human skin, red blotches indicate an infection

    Insect-borne Diseases

    Insect-borne diseases can come from mosquitoes, sand flies, ticks, and fleas. They include Zika virus, Yellow Fever, and Lyme…

  • A woman lying in bed stares at clock in the middle of the night. Insomnia is a sleep disorder where people have trouble falling asleep, staying asleep, or both. It’s more common in older adults and women.

    Insomnia

    Insomnia is a sleep disorder that happens when you have trouble falling asleep, staying asleep, or both. It’s more common…

  • Insulin resistance means your body is unable to process all the insulin your body is making. It is linked to prediabetes and type 2 diabetes.

    Insulin Resistance

    Insulin resistance is a condition linked to prediabetes and type 2 diabetes. Insulin resistance means your body is unable to…

  • Woman with hands crossed over her pelvis as if she is in pain or needs to use the restroom. Interstitial cystitis is chronic inflammation of the bladder. This inflammation can scar the bladder or make it stiff.

    Interstitial Cystitis

    Interstitial cystitis is chronic inflammation of the bladder.

  • illustration and cross-section of kidneys

    Interstitial Nephritis

    Interstitial nephritis is a kidney disorder that affects your kidneys’ ability to filter waste and extra fluid.

  • Overweight female with fat folds under her bra clasp in the back

    Intertrigo

    Intertrigo is a rubbing of the skin in areas where the skin folds and becomes moist.

  • Closeup of a mother helping her toddler walk in the grass

    Intoeing

    Most people’s feet point straight ahead or outward. Some people, however, have feet that point inward. This is called…

  • A baby cries in distress. Intussusception is a serious problem with the intestine that prevents the passage of food through the intestine. It is a medical emergency.

    Intussusception

    Description: Intussusception is a serious problem with the intestine that prevents the passage of food through the intestine.

  • Man's hands on his stomach with red spot indicating pain caused by irritable bowel syndrome (IBS)

    Irritable Bowel Syndrome (IBS)

    Irritable bowel syndrome (IBS) is a gastrointestinal (GI) disorder. It describes a group of symptoms that affect your large intestine…