Blood dysentery usually refers to dysentery, is to abdominal pain, acute and severe (lower abdomen is uncomfortable, very want to relieve stool, after defecation, there is a sense of incomplete defecation), down the red and white pus and blood stool as the main symptoms of the disease, due to the blood in the stool symptom, so it is also known as blood dysentery. The common causes of dysentery are exogenous dampness and heat, epidemics, dietary internal injuries, resulting in stagnation of evil qi in the large intestine, damage to the blood in the large intestine, resulting in discharges of pus and blood, red and white at the same time. Clinically, it is divided into damp-heat dysentery (dysentery caused by damp-heat evil), epidemic dysentery, cold-damp dysentery, etc. Different types, different medications. If it is damp-heat dysentery (dysentery caused by damp-heat evil), the symptoms of dysentery are reddish and white, burning in the anus, short and reddish urine (small amount of urine, dark yellow color), etc., it can be treated with Paeonia lactiflora Tang plus subtractions; If it is epidemic dysentery, symptoms see discharges of bright purple pus and blood, irritability and even delirium (confusion, nonsense), etc., it can be treated by adding and subtracting Bai Tou Weng Tang with Paeoniae Materiae Tang; if it is cold-damp dysentery, symptoms see more white and less red, heavy head and body, pale mouth, etc., it can be treated by adding and subtracting Gastro-ling Tang. It is recommended that the doctor selects the prescription and uses the medicine. If bloody dysentery occurs, it is recommended to ask the doctor for a clear diagnosis and use the right medicine under the doctor’s guidance.