Red thread-like material in the stool is considered to be caused by hemorrhoids, enteritis, anal fissure and other diseases. 1. Hemorrhoids: poor bowel habits, long-term diarrhea and other factors can trigger the occurrence of hemorrhoids, perianal pain, bleeding and other discomfort symptoms, so you will see the stool will have red thread-like material. You should improve your bowel habits, such as regular defecation, control the time of defecation; cultivate dietary habits, eat more high-fiber fruits and vegetables. 2. Enteritis: due to intestinal bacterial infection, immune imbalance and other reasons, abdominal pain, diarrhea, blood in stool and other symptoms, so you can see red thread-like material in the stool. 3. Anal fissure: anal pain, constipation, small amount of bleeding during defecation, which can be manifested as red thread-like material in stool. There may be other reasons for the red thread-like material in the stool, it is recommended to go to the hospital as soon as possible, to clarify the cause of the disease, and standardized treatment under the guidance of the doctor, so as not to delay the condition.