Hello and Welcome to ‘Ask A Doctor’ service. I have reviewed your query and here is my advice. As per your complain you have problem of thin stool that may be because of intestinal condition like celiac disease. Lack of water and fiber in diet cause thin stool. Intestinal parasite infection like giardia cause thin color stool. Irritable bowel syndrome may cause change your bowel habit. Crohn s disease may be ruled out. Consult a gastroenterologist for further diagnosis. Stool sample test is helpful to detect any infection present or not. Colonoscopy can be done for further diagnosis. I hope my guidance helpful to you. Let me know if I can assist you further. Take care. Thank you. Regards, Dr. Rachana Goswami