Hello doctor,
I had a cold sore appear on my mouth which I very rarely get (I have had them, although pretty rare since I was young). My partner also gets cold sores, however, he gets them quite frequently, and has been since he was young. When I saw mine appear a few days back, I was wondering if it is possible to get a cold sore from giving oral. If that is the case, does that mean that my partner should get checked for STD? If my partner needs to get checked for STD, how could he have caught an STD?