When faced with a stomach ache on the left side of the body, it is easy to jump to conclusions about the current state of health of the body without any distinctive proof about the actual condition. Many times a stomach ache on the left side of the body is only due to indigestion or constipation, which is a buildup of body wastes that cannot evacuate properly. It is often not a sign of alarm unless the stomach ache persists. If this is the case, it could be the sign of kidney stones or a stomach ulcer, which would need to be attended to by a medical professional.

Often when the body does not receive enough fiber or water, it will hold onto wastes and prevent secretions of stools efficiently. This is often termed constipation and causes cramps and stomach tenderness. The pain is often perceived as a stomach ache on the left side of the abdominal area and is treated with indigestion or laxative medicines. The simplest way to decrease constipation is to consume more water to provide lubrication for the stool and to also slowly increase fiber intake through vegetables or fiber supplements, which will add bulk and help move the stool for easy evacuation.

A more serious form of a stomach ache on the left side of the body may indicate the formation of kidney stones, which are small and dense buildups of mineral deposits. Since the pain is on the left side, it is indicative of a possible kidney stone which has originated in the left kidney. In this case, over the course of a few hours, the pain on the left side of the stomach will move into the middle of the stomach, creating stomach tenderness or soreness. It is important to get an individual with these symptoms to an emergency room immediately for treatment.

Stomach ulcers may also contribute to a stomach ache on the left side of the body. Ulcers are mainly caused by an inflammation and a small erosion in the gastrointestinal tract. This contributes to pain and discomfort, but ulcers are usually benign and not harmful. Treating ulcers may involve decreasing acid in the stomach or increasing friendly, helpful bacteria in the intestines to promote healthy flora to smooth the inflammation in the stomach.