Hi. I have had a stinging/throbbing/burning pain on one side of my labia for almost 6 months. It almost feels like someone poured acid on it. I've been treated for yeast infection by 4 different doctor on 4 occassions. Finally they swabbed me after I've had enough of taking pills , putting creams and inserting pessaries. All tests were negative including yeast but the burning pain is still there. I've felt it everyday for the past 6 months even whilst receiving yeast treatment. Canesten and other anti fungals are hurting me & make me feel very uncomfortable. Sometimes I also feel pain in the opening of my vagina. Discharge is transparent & not smelly. Pain increases during the day but I'm fine at night. There is no itching. What can it be?