How To Treat Itchiness And Redness In Genitals After Having Unsafe Sex?

my boyfriend and I had sex last night and this morning he woke up with redness and itcyness on and above his penice where his pubes should be and inside the top of his thigh. he said after itching his testicle, he itched his face and now his face is red and itchy. we had unprotected sex, which is normal, I've never been with anybody else while with him and neither has he. what is going on?!!!