Is there a reason for upper ab pain besides gallbladder or liver?

Yes ....: Other things can include gastritis (inflammation of the stomach) or ulcers. Both of these things tend to cause upper abdominal pain or to the right upper abdomen.

Many reasons: There are several reasons for upper abd.Pain besides gallbladder or liver.It can come from stomach, duodenum , spleen and frequently from pancreas.

GAS!: Even a gas bubble can cause significant pain in the area where the liver and gallbladder are. The large intestine curves right under the liver and gas bubbles often "get stuck" there because of our normal anatomy and gravity. The most important thing is to get checked if the pain worsens or won't go away. We'd rather tell you it's gas than have you sit home with something more serious.

Lots: May just be gas, but...Can be due inflammation of stomach, duodenum, ulcers of either, tumors, pancreas issues, colon problems, esophagus issues, spleen, blood vessel (aorta), even cardiac or gyn related depends on location, type of pain, duration, other symptoms, individual's age, sex, meds, etc. See your doc.