Hi. I ve gone through your query and I can understand your anxiety. Your condition might be a contact dermatitis resulting from - the chemicals or materials or Adhesives used up in the pads - Friction against the skin or - if not changing pads often leads to the build up of too much moisture & finally acting as a breeding ground for bacteria which in turn resulting in rash or infections. I advice you to, - Use all-natural pads made of cotton ( contains no dyes or irritating adhesives & also fragrance-free). - Change your pads often in a day - sitz bath to relieve irritation, swelling & soothening. - Take flagyl antibiotics for a week or use hydrocortisone cream on the outer vulva area Hope I have answered your query. Let me know if I can assist you further. Take care. Regards, Dr. Yogapriya V, General and family physician.