Some causes of gallbladder and stomach pain include gallstones, peptic ulcer disease and gastritis, according to Mayo Clinic, WebMD and MedlinePlus. Gallstones often cause no symptoms until they lodge in one of the ducts of the gallbladder, says Mayo Clinic. In that case, they cause severe pain in the center or upper right part of the abdomen which may radiate to the right shoulder or the place between the shoulder blades.
Ulcers are sores that are found in the lining of the stomach or the duodenum, which is the last section of the stomach or the first section of the patient's small intestine, claims WebMD. Peptic ulcers are often caused by infection by the Helicobacter pylori bacteria, but can be caused by other things as well. Symptoms of an ulcer are pain in the upper or middle part of the stomach that's described as burning or gnawing. The pain usually comes at night or between meals. The pain may be accompanied by bloating, nausea, vomiting or heartburn.
Gastritis is when the lining of the stomach is swollen or inflamed, says MedlinePlus. It can be acute or chronic and caused by medications, consumption of too much alcohol or H. pylori infection. The pain is felt in the upper abdomen and can be accompanied by nausea, vomiting and loss of appetite.