Hemorrhoids anal swelling for a month is still not good may be hemorrhoids prolapse out of the anus, the formation of blood clots and other causes. 1. hemorrhoids out of the anus: hemorrhoids are hemorrhoidal veins of the blood vessels tortuous formation of blood vessel mass, with the growth of hemorrhoids, may be out of the anus, causing anal discomfort, swelling, itching, and other symptoms, thus hemorrhoids anus swelling for a month is not yet good phenomenon. 2. Formation of thrombus: If the veins at the hemorrhoids bruise to form a thrombus, resulting in a hard purple mass around the anus, may cause anal swelling, but also hemorrhoids anal swelling for a month is not good phenomenon, when the anal sphincter muscle contraction, the feeling of swelling is aggravated. Therefore, hemorrhoids anal swelling for a month is not good patients, should be as soon as possible to the hospital, clear cause, under the guidance of professional doctors for standardized treatment, to avoid delays in the condition.