There is a hard lump on the right side of the anus, and it hurts to stand, sit and cough, which may be related to thrombosed external hemorrhoids, perianal abscess, sinusitis and other causes. 1. thrombosed external hemorrhoids: external hemorrhoids formed a bruise, blood vessel rupture subcutaneous aggregation, in the anal opening can be seen in a hard lump, there can be obvious pain, and even stand, sit and cough pain. 2. Perianal abscess: the perianal rectum and surrounding tissues are infected with suppurative foci, which can appear anal lesions, itching, severe pain and other symptoms, which can be manifested as the phenomenon of pain when standing, sitting and coughing. 3. Sinusitis: due to inflammation and infection of the sinus area, congestion and edema, causing an inflammatory reaction, which can be manifested as anal distension, a feeling of falling or a foreign body sensation, can cause the anus in the phenomenon of standing, sitting and coughing are painful. It is recommended that the right side of the anus has a hard lump and standing, sitting and coughing pain in the crowd in time to go to the hospital, clear cause, follow the doctor’s instructions in the doctor’s guidance for standardized treatment, so as not to delay the condition.