The causes of anal drop feeling better when sitting and fine stool include hemorrhoids, rectal cancer, etc. The treatment includes medication such as glucocorticosteroids, surgical treatment and so on. 1. Hemorrhoids: Hemorrhoids refers to the expansion of the venous plexus of the anal canal or the lower part of the rectum to form a mass of veins. When the anal cushion moves down or the venous plexus becomes congested to form hemorrhoids, it will often lead to anal pain accompanied by a feeling of falling and thinning of stools and other symptoms. Treatment includes medication, such as hydrocortisone, ibuprofen, etc. If the condition is serious, it can be treated by surgery, such as hemorrhoidectomy. 2. Rectal cancer: Rectal cancer refers to malignant tumors occurring in the mucous membrane epithelium of rectum, with the gradual increase of tumor, it will eventually cause compression symptoms, which manifests as feeling of dropping in anus, urgency and heaviness, change of defecation habit, weight loss and other symptoms. Treatment includes drug therapy, such as bevacizumab, capecitabine, etc. Surgery combined with radiotherapy is the main treatment method. Drugs need to be selected under the guidance of the doctor. When patients experience discomfort such as anal drooping and thinner stools, they should go to the hospital immediately for a clear diagnosis and reasonable treatment as early as possible to avoid delaying the condition.