Vulvar swelling and pain may be caused by trauma, or local stimulation or disease factors, as follows: 1. Trauma: If there is no previous vulvar swelling and pain, after the existence of bumpy road cycling, strenuous sex, other external violence injury, etc., women suddenly appear vulvar swelling and pain, need to consider trauma injury caused by; 2. Local stimulation: vulvar swelling and pain during menstruation, may be a long time to use sanitary products and not replaced in time, stimulating the skin and mucous membrane of vulva, causing inflammation and swelling and pain of vulva. In addition, allergy to sanitary napkins or wearing tight chemical fiber underwear, urine stimulation, etc. can also cause the above symptoms; 3. Disease factors: If you have chronic pelvic inflammatory disease, long-term inflammation may lead to pelvic tissue exudation and spread to the pelvic floor, causing swelling and pain in the pelvic floor and vulva. If the patient has folliculitis or boils in the vulva, there may also be limited swelling and pain, and an obvious rash may be found. In addition, the presence of uterine prolapse, vestibular gland cysts or abscesses, and vulvar tumors can cause vulvar swelling and pain. Common vulvar tumors that cause pain in the vulva include papilloma, sweat gland tumors, and fibroids. Squamous cell carcinoma of vulva may cause patients to present with lumps, swelling and pain, oozing and bleeding, and basal cell carcinoma of vulva may cause patients to present with local itching, burning sensation and swelling and pain.