usally lying down or drinkin water helps. drinkin certain drinks like tea and hot mint water with a little bit of honey can help as well. if its serious then you should go see a doctor. stomach pain can be the cause of food poisoning or gastrointestinal disease.
Depending on the pain, if it’s hurting from a random cause, having pH balanced water will help your bloodstream, if it’s hurting in a way of throwing up, make sure to fill up on fibers and have pH balanced water, the pH levels can disturb everything in the body, from poisoning to dehydration