Fresh blood during defecation can be considered to be related to anal fissure, hemorrhoids, rectal polyps or rectal cancer. 1. Anal fissure: it can be seen when the feces is dry, the mechanical trauma caused by defecation or diarrhea, etc. It causes severe pain, and a small amount of blood can be seen on the surface of the feces or on the stool paper or drops of fresh blood. 2. hemorrhoids: such as in the occurrence of internal hemorrhoids, there will be painless intermittent bleeding after defecation, defecation may have internal hemorrhoids prolapse, internal hemorrhoids serious, but also can have jet bleeding performance. Mixed hemorrhoids may also appear bleeding performance. 3. Rectal polyps: when the polyps increase in size, intermittent blood in the stool can occur, presenting bright red blood on the feces. 4. Rectal cancer: due to the cancer breaking and bleeding, blood and mucus on the surface of stool or even pus-blood stool may be found. There may be other reasons, such as constipation, coagulation disorders and so on. It is recommended to go to the hospital specialist in time, complete the examination, clarify the cause of the disease, and then follow the doctor’s instructions for treatment.