I would suspect it is a vitamin deficiency caused by the birth control pills. B6 and Pantothenic acid and possibly niacinimide or other B vitamin. Best to just take B complex high potency 2 x day. Also: Vitamin E and A, beta carotene and zinc. Eat yoghurt. Drink lots and lots of water. See if that helps. I couldn't use the Pill--they damaged me and through off my hormones permanently. I had strange symptoms like sore tongue, chronic yeast infections, etc. Also look it up at the homeopathic websites or find a homeopathic doctor. You'll might be surprised how fast you can get relief.