There are hard lumps in the anus and it has many causes: First, if the patient is constipated for a long time, feces is stored in the rectum for a long time, and the lower part of the rectum will form fecal stones after the water is sucked dry, and there can be hard lumps when touched in the anus. Second, if the patient has long-term diarrhea, a lot of alcohol will lead to anal gland infection. The anal gland infection spreads along the rectum into the rectum, thus forming an abscess under the rectal mucosa, and there can be hard lumps in the rectum when touched. Third, if the patient had mixed hemorrhoids in the past, long-term squatting, sitting, and drinking a lot of alcohol will stimulate the varicose veins of the hemorrhoid nucleus, stasis of the hemorrhoid veins, and local formation of thrombus, which is painful to the touch and shows as a hard mass in the anus. Thrombosed hemorrhoids will also have this symptom. Fourthly, if the patient has malignant tumor of anal canal and rectum, there will be hard lump in the anus when touched, and the mobility is generally poor, and anoscopy can be performed to make a clear diagnosis. Therefore, there are many reasons for hard lumps in the anus, which should be combined with medical history for rectal examination. If necessary, auxiliary examinations, such as perianal ultrasound or colonoscopy, can be performed to clarify the cause.