Swelling pain in the anus only with a syringe pumping pus is generally not, leading to swelling pain in the anus may be sinusitis, folliculitis, perianal abscess and other infectious diseases, with a syringe pumping pus should be combined with anti-infective treatment. 1. sinusitis: sinusitis patients usually symptoms for the anal area of redness, swelling, heat and pain, and accompanied by anal swelling, abscesses and so on. Sinusitis patients with swelling and pain using pus drainage treatment, should follow the doctor’s instructions to take erythromycin, cefuroxime and other broad-spectrum antibiotics anti-infective treatment. 2. Folliculitis: perianal hair follicle infection leads to inflammation can lead to anal swelling and pain, in the drainage of pus should be carried out after debridement treatment as well as follow the doctor’s instructions to take azithromycin, cefixime and other antibiotic treatment. 3. Perianal abscess: Perianal abscess is a purulent infectious disease of the anorectal peripheral space. After puncture drainage should be used in conjunction with the use of cefepime, gentamicin and other drugs. Swelling pain in the anus only with a syringe pus extraction generally can not play a complete treatment effect, should follow the doctor’s instructions for anti-infective treatment or surgical treatment, to avoid the development of the disease.