As a human excrement, stool can reflect a certain physical condition of the human body. Stool abnormalities do not have to be anxious, speculation, you can first observe the color of the stool, traits, regularity, etc., to have a general understanding of their own physical condition, you can adjust the diet, adjust the work and rest to change the stool, if necessary, to the regular hospital, so as not to delay the disease, a small disease into a big disaster. When black stool: recall whether you have a recent history of animal blood products (such as pig blood, sheep blood, chicken blood, duck blood, etc.), animal offal, beef, black food, etc. may also appear darker stool, such as changing the dietary structure quickly improved, there is no need to be nervous. When red stools appear: whether there is red dates, red peppers, tomatoes and other red food intake, if the dietary structure is changed quickly after improvement, there is no need to be nervous. When diarrhea occurs: whether there is unclean food or irritating food intake, whether there is a cold, generally no more than 5 times and can be relieved on its own, no need to be nervous. When constipation occurs: recall whether you live a regular life, whether you eat spicy food, eat more fresh fruits and vegetables, drink more water, take rest and live a regular life with moderate exercise, and if you improve quickly after changing your diet and life pattern, there is no need to be nervous. If you have a foul-smelling stool, recall whether you have a history of large protein intake. If you have the following conditions, you should go to a regular hospital immediately to avoid delay: severe abdominal pain; fever; tarry stools; pus and blood stools; jam-like stools; white clay-like stools; membranous material in stools; a feeling of urgency (always wanting to relieve, a little at a time); gradual thinning of stools; progressive difficulty in defecation; symptoms persist for two weeks without relief.