 [ Symptoms ] i have a rash on my upper inner thigh could be sti and spreading [ Disease ] this does not to me like a sti but probably allergic eczema if you dont have other symptoms related to you vagina or fever… you need to wash the area with soap to remove any traces of the chemical do not use any cream on boils and clean with water only for dry eruptions apply a hand lotion 2 times a day in case it turns itchy you could use 1 hydrocortisone cream 4 times in a day