Anal swelling and pain, the cause of this situation should be analyzed and then treated with symptomatic pain relief. The most common cause of anal swelling and pain is perianal abscess. If the anal gland is infected, it will spread along the rectum of the anal canal to the surrounding area, thus leading to more intense perianal pain, which can be clearly diagnosed by performing perianal ultrasound. In this case, the perianal herbal fumigation should be actively given, you can use Wu Bei Zi Tang or pain relief like Shen Tang to fumigate the perianal area first and then wash it, which can reduce swelling and pain, clear heat and dampness. If local pus is formed, perianal abscess incision and drainage should also be actively performed to resolve the pain. If the patient has hemorrhoids, long-term consumption of pepper or a lot of alcohol, constipation, can lead to swelling of the nucleus of the hemorrhoid, which can form a thrombus. If you have a mixed hemorrhoid with thrombus, you should actively perform surgery, either thrombectomy or external and internal ligation of the mixed hemorrhoid, to resolve the pain at the root.