Right bundle branch block comes from a problem with the heart's ability to send electrical signals. It usually doesn't cause symptoms unless you have some other heart condition. Read on for details about this condition.

Rheumatoid vasculitis is a condition that causes blood vessels to be inflamed. It happens in some people who have had rheumatoid arthritis (RA) for a long time.

Post-thrombotic syndrome is a condition that can happen to people who have had a deep vein thrombosis (DVT) of the leg. The condition can cause chronic pain, swelling, and other symptoms in your leg. It may develop in the weeks or months following a DVT.

Relapsing-remitting multiple sclerosis (MS) is a type of multiple sclerosis that causes flare-ups with periods of remission in between. Most people diagnosed with MS start off with this type.

An eye twitch is an involuntary, abnormal blinking of your eyelid. This abnormal blinking may happen many times per day. If eye twitching is severe, it can impair vision.

Ependymoma is a rare type of tumor of the brain or spinal cord. It can happen in both children and adults. In children, these tumors tend to be in the brain. In adults, they are often in the spinal cord.

When something goes wrong with the muscles that direct swallowing, it's called dysphagia.

Dyshidrotic eczema is an ongoing (chronic) skin condition. It causes a burning, itching feeling. Severe cases may also cause a blistering rash.

Detailed information on dilated cardiomyopathy, including causes, symptoms, diagnosis, and treatment.

Learn about diabetic ketoacidosis (DKA), a serious condition that can happen to some people with diabetes.