Back Pain Stomach

How does the nervous system work to register pain? And what are the major causes of acute and chronic pain? Plus, who's at risk of pain here.

Certain diseases can cause the spleen to swell to several times its normal size. Learn the signs and symptoms of spleen problems here.

What are the most common signs of stress? To learn which symptoms of acute, episodic and chronic stress can develop into more serious problems, start here.

How do you know if you're having heartburn or a heart attack? We define symptoms of both ... plus details on when to seek help for GERD here.

Kidney disease can be difficult to detect. Learn the signs and symptoms of kidney disease early so that you will know when to seek medical help.