Hi,
If this crease/cut is painful, bleeding or leaking fluid, appears infected, and swollen you really should have it looked at by a doctor just so it doesn't become worse... Sometimes minor infections, such as yeast infections or Bacterial Vaginosis (BV) can cause cuts and creases around the vulva. You can try taking a hydrogen peroxide bath in the mornings for 5 days; add/mix 1/2 to 1 cup of hydrogen peroxide (start with 3% solution) to a warm bath, soak in the tub for 20 to 30 minutes each day, if possible. Gently swish the water around your vulva during bath; once you dry off completely wear cotton underwear or shorts for maximum air flow. Don't masturbate until this heals. If you don't notice any improvement soon, you should make an appointment w/your doctor for a pelvic exam. Take Care