Bacterial meningitis is an infection of the membranes that protect the spinal cord and brain. Learn more about this condition, including cause, symptoms, diagnosis, and treatment.

Zika is a virus passed on through the bite of a mosquito. It may also be spread through sexual contact and blood transfusions.

Transverse myelitis is inflammation and scarring of the spinal cord that causes pain and weakness in the body.

Borderline personality disorder (BPD) is a kind of mental health problem. People with BPD have unstable moods and can act recklessly. They also have a hard time managing their emotions. Read on to learn more.

A meningioma is a tumor that grows in the meninges, the layers of tissues that cover the brain and spinal cord.

Glycogen storage disease (GSD) is a rare condition that changes the way the body uses and stores glycogen, a form of sugar or glucose.

Tumors on your pancreas, called insulinomas, make extra insulin, more than your body can use. This causes blood sugar levels to drop too low. This can cause symptoms of low blood sugar or hypoglycemia.

Achilles tendon injuries affect the Achilles tendon, a fibrous band of tissue that links the muscles in your calf to your heel. Learn more about these injuries, including what causes it, who is at risk, what the symptoms are, and how it's diagnosed and treated.

Oral hairy leukoplakia is a condition triggered by the Epstein-Barr virus. The condition causes white patches on your tongue. It happens most often in people with weak immune systems.

If you have acquired hemophagocytic lymphohistiocytosis (HLH), your body's immune system does not work normally. Here's what you need to know.