Hard lumps around the anus without pain or itching may be caused by sebaceous cysts, hemorrhoids, lipomas, perianal cancer and other reasons. 1. Sebaceous cysts: the sebaceous glands around the anus become blocked and the secretions are trapped and cannot be discharged to form a hard lump without pain and itching. 2. Hemorrhoids: the veins in the hemorrhoidal area expand, tortuous formation of vascular mass, most commonly seen in connective tissue external hemorrhoids, manifested as a hard lump, no pain, itching. 3. Lipoma: excessive accumulation of subcutaneous fat cells around the anus, forming lipoma, with hard lumps at touch, without pain and itching. 4. Perianal cancer: the early formation of hard lumps, slow growth, no pain, itching. It is suggested that patients should seek medical treatment in time and find out the cause of the disease as early as possible to avoid delaying the condition.