Diseases and Conditions

Babesiosis is an infection of the red blood cells. It’s caused by a parasite carried by deer ticks. It can…

Bacterial, or infective, endocarditis (BE) is a type of infection. It occurs in the valves and inner lining of your…

Bacterial vaginosis is a mild infection in the vagina caused by an overgrowth of bacteria. Researchers do not completely understand…

Barrett’s esophagus is a condition often caused by GERD (gastroesophageal reflux disease). Learn how to help prevent and treat…

Bartholin gland cysts are swollen vaginal glands near the opening of the vagina. Learn about causes and how to treat…

Bedbugs are parasites that can hide in mattresses and feed at night. Learn how to identify, treat, and prevent…

Bell’s palsy is a condition that temporarily paralyzes the side of your face. Learn about the symptoms, causes, and…

A benign breast condition is a lump, cyst, or nipple discharge that is not cancerous. It can affect men and…

Benign paroxysmal positional vertigo (BPPV) is an inner ear problem that causes dizziness.

Benign prostatic hyperplasia (BPH) is the medical term for an enlarged prostate. This condition is associated with aging and mimics…

Bipolar disorder is a mental illness that causes extreme mood swings between mania and depression. Learn about symptoms and…

Bladder stones are hard masses found in your bladder. Symptoms are similar to those of kidney stones and urinary tract…

Blepharospasm is involuntary blinking or twitching of your eyelid. It could be caused by stress or something more serious, such…

Bloating is pain, discomfort, and fullness that occurs in your abdomen (stomach). Bloating can be temporary or severe, depending on…

Blood clots are differently sized clumps of blood that can form inside your body. Most are harmless, unless the clot…

What is blood poisoning? Blood poisoning has nothing to do with poison. It is an early stage of sepsis. Sepsis is a life-threatening infection in your bloodstream. Untreated blood poisoning can cause sepsis. Sepsis can cause organ failure and death. Sepsis is unpredictable

Bone cancer often is caused by the spreading of cancer from another part of the body. Learn about the types…

Breast cancer is a cancer that begins in breast tissue. It usually shows up as one of three types of…

Breast pain is more common in younger women. It is not usually a sign of breast cancer.

Bronchiolitis is a common lung infection in infants and young children. It is often caused by a virus. Symptoms can…