Here is an excerpt of an article from Healthcare Medicine Institute showing evidence that acupuncture is effective for the treatment of functional dyspepsia (indigestion). 

Acupuncture Benefits Digestion, Stops Burning Pain

Results from an investigation conducted by researchers from Hunan University of Chinese Medicine demonstrate that acupuncture is effective for alleviating upper abdominal pain and burning, nausea, and belching. In a semi-protocolized clinical trial, two primary acupuncture points were proven effective for the treatment of functional dyspepsia (abdominal discomfort or pain with no known organic cause identifiable with endoscopy).

Patients were evaluated before and after treatment. First, improvements were recorded using a clinical scoring system. Next, a functional digestive disorders quality of life questionnaire (FDDQL) was recorded for each partient. Third, an electrogastrogram (EGG) was utilized to measure the electrical activity of the stomach (including EGG dominant frequency and slow wave frequency). The results indicate that acupuncture is both safe and effective for the treatment of functional dyspepsia and acupuncture is more effective than mosapride.