Hello I appreciate your concern This could be due to Infection or allergic reaction Here, I would like further information to help you better Your age Any recent exposure to unprotected Sex? Does if appear with passage of urine I would advise you to take ibuprofen for pain Hot water bath will definitely help you Maintain good hygiene Clean your clitoris with an antiseptic solution and keep it moist with antibacterial ointment like mupirocin. if it persists or gets worse, please consult your doctor for physical check up and battery of tests like urine culture and blood profile Hope this helps you wish you good health