A foreign body sensation in the anus and pulling out something like snot may be mucus stool. Causes of mucus stool may be inflammatory bowel disease, dysentery, malignant tumors, etc. should seek medical attention. 1. Inflammatory bowel disease: such as Crohn’s disease, ulcerative colitis, etc., in the intestinal microorganisms involved in the intestinal immune imbalance caused by intestinal damage to the intestinal mucosal barrier, resulting in intestinal mucosal sustained inflammatory injury, discharge mucus-like stools. 2. Dysentery: a kind of intestinal infectious disease caused by bacteria, mainly manifested as inflammation and ulceration of rectum and sigmoid colon, usually manifested as fever, malaise, nausea, vomiting, abdominal pain, diarrhea, mucus, pus and blood stools and so on. 3. Malignant tumors: the more common ones are colon cancer and rectal cancer, which usually have pus and blood, mucus stool, anemia, lethargy and fatigue, etc. Tumor markers as well as relevant auxiliary tests can be checked to make a clear diagnosis. If you feel foreign body sensation in anus and pull out something like snot, it is recommended to go to the hospital as soon as possible for examination and treatment to avoid aggravation of the condition and bring harm to the body.