What diseases belong to the scope of anorectal diagnosis and treatment Anal, rectal, colonic diseases belong to the scope of anorectal diagnosis and treatment. Common anorectal diseases are internal hemorrhoids, external hemorrhoids, anal fissure, anal fistula, anorectal prolapse, etc.; colonic diseases are ulcerative colitis, colonic polyps, colonic diverticulitis, colonic tumors and so on. In addition, such as anal eczema, anal pruritis, warts, a variety of congenital anorectal malformation also belongs to the category of anal diseases. Common Symptoms of Anal Diseases Common symptoms of anal diseases include anal and abdominal pain, blood in stool, anal prolapse, mucus or blood in the anus, protruding anal mass, anorectal foreign body sensation, diarrhea, constipation, mucus and blood in the stool, difficulty in defecation, change in the shape of the stool, chills and fever, abdominal fullness, nausea and vomiting, abdominal mass, anemia. Of course, other diseases can also produce some similar symptoms, should be carefully examined, to be differential diagnosis.