William O. Roberts, MD, a family physician at MinnHealth, in Minnesota, and vice president at the American College of Sports Medicine, likens a stress fracture to bending a paperclip back and forth: Eventually you get little cracks. While stress fractures are pretty common in the lower extremities -- the shin, foot, ankle-- they can also occur in the back or in the arms, says Nicholas A. DiNubile, MD, an orthopaedic consultant to the Philadelphia '76ers and the Pennsylvania Ballet.
A headache or cephalalgia is pain anywhere in the region of the head or neck. It can be a symptom of a number of different conditions of the head and neck. Headaches can result from a wide range of causes both benign and more serious. Brain tissue itself is not sensitive to pain as it lacks pain receptors.
Migraine is a neurological disease characterized by recurrent moderate to severe headaches often in association with a number of autonomic nervous system symptoms. The word is derived from the Greek á¼¡Î¼Î¹ÎºÏÎ±Î½Î¯Î± (hemikrania), pain on one side of the head, from á¼¡Î¼Î¹- (hemi-), half, and ÎºÏÎ±Î½Î¯Î¿Î½ (kranion), skull.he pain is generally made worse by physical activity. Up to one-third of people with migraine headaches perceive an aura: a transient visual, sensory, language, or motor disturbance which signals that the headache will soon occur.