My stomach is hurting and I do not know why what could I do

Abdominal. Abdominal pain can be merely from gas or indigestion, or could be something more serious like appendicitis or an ulcer. I am unable to make a guess at what you are dealing with due to the limited amount of information in your post. If the pain is still present, visit your doctor for a complete history and physical and work up as deemed necessary. I hope you are better soon.