Lemon yellow stool is normal if it is formed and soft once per day. In fact, the change in stool color is related to the type of nutrients contained in the food and the pigments contained in the food itself, as well as to the body’s metabolic condition. It may be due to gastrointestinal tract dysfunction, resulting in indigestion. You can go to the hospital for a routine stool examination. Pay attention to dietary habits, do not eat spicy, greasy, cold, hard-to-digest food, eat more fresh vegetables, such as spinach, leek, celery, etc. After meals, you can eat easily digestible fruits, such as apples, bananas, grapefruit, etc., or you can take probiotics orally for the regulation of intestinal function. Eat more fresh vegetables and fruits, which are alkaline ingredients in your diet.