I always suggest that you use sunscreen and refrain from strenuous exercise immediately afterwards and for the following day. Best, Dr. Green
As you suggest in your question, different doctors are likely to recommend different after-PRP protocols. For deep and soft tissue injections, I generally ask patients to avoid overly strenuous activity and exercise the remainder of the day following the procedure, apply cold compresses to the injected areas to decrease swelling, sleep elevated for a few nights, and take Tylenol (or acetaminophen) as needed for soreness/ discomfort. If PRP is utilized with a microneedling technique (eg, Rejuvapen), I recommend applying a PRP-enriched serum to the treated areas for ~ 24 hours, avoid washing/ using make-up, lotions, etc. on the treated areas ~12 hours, and utilize sunblock regularly starting the day after the procedure. Microneedling patients are asked to hold off topical retinols/ tretinoins for 3 days after the procedure. Good luck with your research! When done well, PRP is an amazing anti-aging procedure.
