Regardless of whether you have herpes or any other skin condition, make sure you disclose this information to your laser hair removal professional during your consultation.
As far as pre- and post-treatment instructions go, they are the same for all clients. The main points remain the same: maintaining your baseline skin tone in order to be safely treated, shaving before treatment, and making sure the area that will be treated is free of deodorant, moisturizers, makeup, or any other topical application.
As long as you don’t have an active outbreak, nothing is stopping you from receiving treatment in that area. If you take antiviral medications to treat your HSV, follow your medical professional’s treatment recommendations.