Symptoms and Causes

Overview Dystonia involves muscle contractions that cause repeated, involuntary movements or abnormal postures. This movement disorder varies in severity and location. When dystonia affects only one…

Overview Spinal cord injuries (SCIs) damage the spinal cord or the nerves at the end of the spinal column called the cauda equina. The spinal cord…

Overview Pectus excavatum creates a sunken appearance in the chest. The breastbone (sternum) dips inward, and this depression can range from mild to severe. Deeper cases…

Overview Reactive arthritis involves joint inflammation that happens after an infection somewhere else in the body. The infection typically starts in the intestines, genitals, or urinary…

Overview REM sleep behavior disorder causes people to physically act out their dreams during rapid eye movement (REM) sleep. This condition involves sudden movements and vocal…

Overview Headaches triggered by sexual activity, particularly during orgasm, can occur in rare cases. These may present as a gradual dull ache in the head and…

Overview Wheat allergy happens when the body’s immune system reacts to wheat proteins. This response can occur after eating wheat products or sometimes by breathing in…

Overview Peanut allergy occurs when the immune system incorrectly identifies peanuts as harmful substances. This condition ranks among the most common food allergies. It can trigger…

Overview Myocardial ischemia happens when blood can’t reach heart muscle cells properly. This lack of blood flow means the heart doesn’t get enough oxygen to work…

Overview Liver hemangiomas are non-cancerous masses made of tangled blood vessels in the liver. These benign growths, also called hepatic or cavernous hemangiomas, are relatively common…