Me And My Boyfriend Have Been Having Sex And We

Me and my boyfriend have been having sex and we both noticed that it was painful for the both of us..so we got to checking our privates out and discovered that on his pnis he has a red rash like place on the base of the penis and I have a reddish like rash on the outer part of the vagina around the lips with no smelly discharge or anything...Please help us figure out what is going on so we can have wonderful amazing sex again!