Vagina area is uncomforta. One?

Vagina and its surroundings are itching and burning like hell.skin there has become black.masturbation was done since 2years.i does it from the clothes on very rough clothes.left labia will be paining occasionally.there's one blister type some pimple size one which pains,burns,itches a lot.it comes occasionally at the same spot.periods are regular and normal.Vagina area has all become blackish pink colour.very uncomfortable while wearing panties.white discharge is very frequent mom has too.I'm very inactive n dull.over weight.dark pigmentation at neck,mouth,inner thigh and vagina ,under arms,elbows.have hypo thyroid since 9 years n no medication is being taken.virgin.thighs are so big that unable to sit in a chair with them attached.blood% 47%.haemoglobin%6%.very low resistance power.what should be done to relieve vagina from pain and itch and have a healthy n comfortable one?