There are different types of hard nodules under the skin of the anus: for example, perianal abscess, hemorrhoids, anal fistula, etc. Different types of nodules have different solutions that 1. Perianal abscess: the typical symptom is that the patient has a small lump around the anus, sudden severe pain, accompanied by localized fever, restlessness and so on. You can take oral or intravenous antibiotics, such as cefixime, metronidazole, etc. for anti-infective treatment, but also oral laxatives, such as Ma Ren Lunch Pills, etc., or topical liquid paraffin to reduce the pain during defecation. 2. hemorrhoids: acute attack due to hemorrhoidal nuclei within the fibrin oozing more, thus forming a solid skin pendant, so that the skin around the anus appeared to be hard. Mild hemorrhoids can be used externally with Ma Yinglong musk hemorrhoid cream or anus tai suppository, etc., the effect is not good enough to consider surgical treatment. 3. anal fistula: the main manifestation is the appearance of purulent perianal secretion, due to the stimulation of secretion, there can be itching in the anus, when there is abscess formation in the fistula, you can feel obvious pain, hardness. Surgical incision and drainage is the best treatment, so as not to aggravate the condition with repeated attacks. Anal subcutaneous hard nodules can also be seen in other diseases, to go to the hospital as soon as possible to find out the cause of the disease, give targeted treatment, so as not to delay the condition.