Belly problem is a term used to describe any type of abdominal pain or discomfort. A common symptom of a belly problem is an ACHE, which is a dull, continuous pain that can range from mild to severe. It is usually localized to the abdomen and can be caused by a variety of conditions, such as indigestion, constipation, gas, or even a more serious medical condition. Treatment for an ACHE related to a belly problem will depend on the underlying cause.