Your upper abdominal pain in the area of stomach, or just below the breast bone, is probably due to gastritis, or inflammation and/or irritation of the stomach lining membrane (mucosa).
Pain due to gastritis is usually described as burning, aching, gnawing, or sore, and can be sharp, stabbing, or cutting like.
It may also feel as going right straight through a person as it travels from the belly to the back.
Belching, nausea, vomiting, feeling fullness, bloating, loss of appetite are additional symptoms of gastritis.
Use of non-steroidal anti inflammatory drugs, or pain killers as ibuprofen during the recovery period after appendectomy, and stress during the surgery, are two possible causes for your case of gastritis.
This condition is effectively treated with medications.
Consult your physician!
Marija