You have a candida overgrowth or fungal infection.
Check with your doctor on medication to take. I tried
alternative for years and only meds cleared it up. Many
doctors labeled it psoriasis and other skin disorders as
i had a scalp issue and rectal itch also. Only the dose
of 400mg of ketoconizale cleared it all up.
Additionally, you must change lifestyle. No sugar in diet
(including substitutes or any type of soda), lots of fresh
fruits and veggies. And daily exercise -4 to 5 times weekly.
Lots of water - 8 glasses, 8 ounzes daily. No alcohol.
Good luck