An ulcer.
Open sores that occur inside the stomach lining are called ulcers. Having these ulcers frequently is referred to as open sore stomach.
Ulcer
An ulcer is a sore that forms in the stomach lining or small intestine, often caused by bacteria or excessive use of pain relievers. Symptoms include stomach pain, bloating, and nausea. A canker sore is a small, painful ulcer that forms inside the mouth, typically caused by stress, injury, or certain foods. Symptoms include a white or yellowish sore with a red border inside the mouth.
A sore on the inner walls of the stomach is commonly referred to as a gastric ulcer. It is a type of peptic ulcer that occurs in the lining of the stomach. Gastric ulcers can cause symptoms such as abdominal pain, bloating, and nausea.
There are a number of reasons why you may have sore skin on your stomach and back. You may be having an allergic reaction for example.
Possibly diverticulitis. See a doctor.
Usnea is used to treat abscesses, colds, cough, cystitis, fungal infections (such as athletes foot or ring-worm), gastrointestinal (stomach and intestine) irritations, influenza, sore throats (including strep throat), respiratory infections
An ulcer is a sore or lesion that forms in the lining of organs such as the stomach, small intestine, or mouth. It can be caused by stress, bacteria (such as H. pylori), excessive use of nonsteroidal anti-inflammatory drugs (NSAIDs), or other factors. Symptoms may include pain, burning sensation, or bleeding.
Pregnancy.
I really don't ask someone else
Canker sore in Filipino is called "singaw." It is a small, shallow ulcer that can appear inside the mouth on the gums, cheeks, or lips. Singaw can be painful and may last for about a week.
Gastric Ulcer