Understanding New and Severe Abdominal Pain

There are several dangerous infections that may be causing your pain. Two possibilities include an infection of the liver ("hepatitis") and an infection of the gallbladder ("cholecystitis"). You should be evaluated by a doctor immediately.

The upper abdomen is also a common location for the painful skin rash of "shingles" (Varicella zoster infection). This infection can sometimes cause a low-grade fever.