Suggest Cure For Skin Rash

I have this rash for over 4 years. I used everything to get rid of it. I got it after I give birth to my son, I used nair- product on my legs. I usually just shave them, right after a few days my whole legs were covered with small pimple like bumps, most of them went away. but the one near my ankle just keeps spreading, it would shrink after using a different ointment, dried up and look like, it s finally leaving, then it spreads again. I don t know what to do....