Pseudotumor cerebri is a disorder related to high pressure in the brain. It causes signs and symptoms of a brain tumor. It is also called intracranial hypertension.

Pseudotumor cerebri is a disorder related to high pressure in the brain. It causes signs and symptoms of a brain tumor. It is also called intracranial hypertension.

Idiopathic pulmonary fibrosis (IPF) occurs when the lung tissue becomes scarred. No one knows what causes this scarring. IPF is the most common form of interstitial lung disease, a group of diseases that affect the tissue between the ...

An IgG deficiency is a health problem in which your body doesn’t make enough Immunoglobulin G (IgG). People with IgG deficiency are more likely to get infections.

Iliotibial band syndrome (often called IT band syndrome) is a health problem that causes pain on the outside of the knee. It mostly commonly happens in athletes, especially distance runners, or those new to exercise. Read on to learn more.

Immune thrombocytopenic purpura (ITP) is a blood disorder. With this disease, you have a lower amount of platelets than normal in your blood. Platelets are blood cell fragments that help with blood clotting. Having fewer platelets can ...

ITP is a blood disorder that causes a decrease in the number of platelets in the blood. Platelets help stop bleeding. So, a decrease in platelets can result in easy bruising, bleeding gums, and bleeding inside the body. The lower the ...

IgA nephropathy is a chronic kidney disease. It progresses over 10 to 20 years, and can lead to end-stage renal disease. Read on to learn about causes, symptoms, diagnosis, and treatment.

Immunoglobulin A (IgA) is a blood protein that's part of your immune system. Your body makes IgA to help fight off sickness. Having an IgA deficiency means that you have low levels or no immunoglobulin A in your bloodstream.

Immunotherapy is a type of cancer treatment that uses the body's own immune system to fight cancer. The immune system naturally defends the body against cancer cells. However, some cancer cells grow and spread by hiding from the immune ...

A buildup of earwax is called impacted earwax. It can cause symptoms such as hearing loss. Impacted earwax is very common. With age, earwax tends to become harder and less mobile. Older adults are more likely to have problems with excess...

Imperforate anus is a problem that your child is born with. It happens when your child has a blocked or missing anus.

Impetigo is an infection of the outer layer of the skin. It's most often caused by certain bacteria. Impetigo is much more common in children, but adults can get it too. Learn details about causes, symptoms, and treatment.

Impetigo is an infection of the skin. When it affects just the surface, it’s called superficial impetigo. Impetigo can also affect deeper parts of the skin. This is called ecthyma. It may occur on healthy skin. Or it may occur where the ...

Impingement syndrome describes a condition in which the tendons of the rotator cuff of the shoulder are pinched as they pass between the top of the upper arm (humerus) and the tip of the shoulder (acromion). The rotator cuff is a group ...

An implantable cardioverter defibrillator (ICD) is a small electronic device used to continuously monitor and help regulate potentially fast and life-threatening electrical problems with the heart.

Pacemakers and implantable cardioverter defibrillators (ICDs) are heart devices. They are surgically placed in people. Pacemakers are used to treat slow heart rhythms. ICDs stop dangerous

Inappropriate sinus tachycardia (IST) is a health problem in which the heart beats very quickly without a good reason. It is a type of heart rhythm abnormality called an arrhythmia.

A brain injury or some other health problem can cause growing pressure inside your skull. This dangerous condition is called increased intracranial pressure (ICP). It can lead to a headache. It can also further injure your brain or ...

Indigestion (dyspepsia) is a pain or burning feeling in your upper belly or abdomen. It is common in adults.

An infant of a mother with diabetes is a baby who is born to a mother with diabetes. Because the mother has diabetes, the baby is at risk for problems.

The esophagus, which extends from the mouth to the stomach, can be infected by bacteria, fungi or viruses. The most common viral causes of esophageal infections are herpes simplex, chicken pox virus and cytomegalovirus. These are ...

Infectious esophagitis is swelling and irritation of your esophagus, triggered by an infection.

Infectious mononucleosis is a contagious illness. It’s common in teens and young adults.

Infectious mononucleosis causes swollen lymph glands, fever, sore throat, and chronic fatigue.

An inferior vena cava (IVC) filter is a small device that can stop blood clots from going up into the lungs. The inferior vena cava is a large vein in the middle of your body. The device is put in during a brief surgery.

Infertility is a problem of the reproductive system. It impairs the body's ability to reproduce. It could be caused by a problem with the man's system, the woman's system, or both.

The aorta is the largest artery in the body. It rises from the heart's left ventricle (the major chamber that pumps blood out of the heart) and is filled with oxygen-rich blood that travels throughout the body. When this artery becomes ...

Inflammatory bowel disease (IBD) refers to certain chronic diseases that cause inflammation (painful swelling, usually with heat) of the intestines. Crohn's disease and ulcerative colitis are the two terms most often assigned to the ...

A rare but aggressive form of cancer, inflammatory breast cancer blocks the lymph vessels in the skin of the breast. The condition often causes the breast to appear swollen, red and inflamed.