Bactrim can be applied to the vulva. It is an antibiotic ointment. When a woman suffers from vulvar inflammation or canker sore infection, she needs to wash it with gynecological lotion, Jelqing, and then apply it locally to effectively sterilize and anti-inflammatory effect. If the effect does not improve after treatment, you need to go to the hospital for follow-up if necessary. During treatment, you need to pay attention to keep the vulva clean and hygienic, wear loose underwear, change it daily, and do not eat spicy and stimulating food in the diet, which is conducive to the relief and treatment of the condition. A small number of women may experience local itching, redness, swelling and allergy after topical application of Bactrim, so they need to stop the drug and switch to other drugs for treatment.