Anal distension is not related to lower extremity deep vein thrombosis. Anal distension is the discomfort of anal or rectal distension around the anus or the lower end of the rectum or anus, often accompanied by a sense of foreign body prolapse, anal obstruction and a sense of urgency and heaviness, etc., caused by the causes of peritoneal stimulation of the local symptoms, such as chronic pelvic inflammatory disease, etc.; pelvic floor occupancy of the compression of the uterus such as pregnant women, etc., the increase in uterus. Functional changes in the pelvic floor, such as visceral prolapse, etc.; local lesions of the anorectum can also cause anal swelling, such as proctitis or intrarectal prolapse, cyclic hemorrhoids and so on. Deep vein thrombosis of the lower limbs refers to blood clotting in the deep veins of the lower limbs to form a thrombus, the main symptoms are swelling of the limbs, pain, pressure and pain in the muscles at the back of the calf, the root of the thigh and the area where the vein flows through, etc., and the complications caused by it include pulmonary embolism and post-thrombotic syndrome in the acute stage. Therefore, to summarize, there is no relationship between anal swelling and lower extremity deep vein thrombosis. It is recommended that patients go to the regular hospital in time, clear cause of the targeted treatment, do not use private medication to avoid causing adverse effects and delay the condition.