My wife had bypass surgery. Now uric acid in her blood is elevated. What are purines?

My wife is 43 years old. She is 54 kilograms (199 pounds) and 158 centimeters (5 feet 2 inches). She had bypass surgery in September 1997. She is quite fine now, except that uric acid level in her blood is slightly elevated (7.2 milligrams). She exercises very regularly and maintains a strict diet, especially...

A friend reported getting a headache so severe he had to stop until it passed in a few minutes.

A friend of mine recently reported getting a headache so severe during intercourse that he had to stop what he was doing until it passed in a few minutes. It was so bad that he is afraid it may be serious. Any ideas on what it might be? I would highly recommend your friend see...