Whether the lesion that occurred on your arm is HSV-1 as well will be almost impossible to tell at this time, particularly if you are taking
famciclovir. Auto inoculation is uncommon in persons with HSV but if it occurs, it typically occurs only at the time of and from the site of the initial infection. As I understand it, you have HSV-1 and the lesion you describe is a recurrence, not your first outbreak. If that is so, as Teri has told you, it is very unlikely to be HSV.