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. You can get it on occasion, or…

  • 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 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 Abuse

    Inhalant abuse is a form of substance abuse. It involves breathing in or sniffing household products on purpose to “get…

  • 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…

  • woman lying in bed stares at clock in the middle of the night


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

  • Insulin Resistance

    Insulin resistance is a condition that can lead to pre-diabetes and type 2 diabetes. Diet and lifestyle changes and prescription…

  • Woman with hands crossed over her pelvis as if she is in pain or needs to use the restroom

    Interstitial Cystitis

    Interstitial cystitis is a medical condition. It represents chronic bladder inflammation.

  • 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 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


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

  • close-up of a crying baby in distress


    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…