Intestinal Worms Definition: Intestinal worms are common in rural areas and in underdeveloped countries. They are especially common in children. Fortuneately, they are easy to cure. For years there has been natural herbal remedies for worms, now we use pills with these natural products for ease of use. Intestinal worms commonly cause indigestion and abdominal aches and pains. Severe and prolonged cases can cause obstruction. Therapy: There are many antihelmintics. Mebendazole is an easy to obtain preparation and in the vast majority of cases, one dose erradicates the worms. If problems, follow up with your physician.