3 yrs 19 kg having lose motions that 3 days ago stoped but have come back with lesser freq and cramps.no fever,blood or mucus in stool. is med needed?

Gastroenterologist: If you're experiencing frequent loose movements for that long and have lost significant weight, it appears that this is more than an irritable bowel syndrome and could be a bacterial or parasitic infection or inflammatory bowel disease that requires treatment. Gluten intolerance is also a possible cause. A gastroenterologist is best qualified to evaluate,advise and treat you and order proper tests