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Chronic Bronchitis What is chronic bronchitis? Bronchitis is inflammation of the breathing tubes. These are the airways called bronchi. This inflammation causes too much mucus to be made and other changes. Bronchitis can be acute (short-term) or chronic (long-term). Chronic

Pulmonary Emphysema What is emphysema? Emphysema is a progressive chronic lung condition in which the tiny air sacs (alveoli) are damaged or destroyed. When this happens, it causes the tiny air sacs to rupture and create one big air pocket instead of many tiny ones. Air becomes

Actinic Keratosis What is actinic keratosis? Actinic keratosis (AK) is a rough, scaly spot or bump on sun-exposed skin. Most people with AK have more than one spot. AK is the most common precancer of the skin. Over time, it can develop into squamous cell skin cancer. Most

Food Allergy What is a food allergy? A food allergy is when your immune system has a bad reaction to a certain food. This is different from a food intolerance, which does not involve the immune system. This is true even though some of the same signs may be present. What causes a

Erectile Dysfunction (Impotence) What is erectile dysfunction? Erectile dysfunction (ED) or impotence means you can’t get an erection. It can also mean you aren't happy with the size or hardness of your erections, or how long your erections last. In the past, ED was thought to be

Vaginitis What is vaginitis? Vaginitis is any inflammation or infection of the vagina. It's common in women of all ages. About 1 in 3 women have vaginitis at some time in their lives. What causes vaginitis? Bacteria, yeast, viruses, parasites, and chemicals in creams or sprays

Benign Prostatic Hyperplasia (BPH) What is benign prostatic hyperplasia? Benign prostatic hyperplasia (BPH) is also called benign prostatic hypertrophy. It means that the prostate gland has become very large and may cause problems passing urine. BPH is not cancer. It's a common

Metabolic Syndrome What is metabolic syndrome? Metabolic syndrome is when you have 3 or more health problems that put you at higher risk for diabetes, heart disease, and stroke. It is also known as insulin resistance syndrome. It’s also called syndrome X. If you have metabolic

Lupus What is lupus? Systemic lupus erythematosus (SLE or lupus) is an autoimmune disease that causes your body’s immune system to attack its own cells and tissues. It causes episodes of inflammation to various parts of the body. It can affect your joints, tendons, and skin. It

Viral Hepatitis Overview What is hepatitis? Hepatitis is inflammation of the liver. The liver is located in the upper right part of the belly (abdomen). Hepatitis can be caused by a virus that leads to damage of liver cells. Hepatitis has 2 types: Acute hepatitis. This type