Both therapies are excellent approaches for skin rejuvenation and can be done together. However, I would first ask in what setting are you receiving the PRP (eg. microneedling, scalp restorations) and are the PRP injections in the same area you are receiving the RED Light therapy? I would not necessarily recommend Red Light therapy immediately after a microneedling procedure that uses RF--one might not be tolerate the potential skin irritation that can result from either treatment. However, if your are receiving straight PRP injections without any other procedure or treatment, I would not hesitate to recommend doing the Red Light therapy during the same session. If you are doing either treatment for the first time, you may want to space out the 2 treatments just to make sure you don't have any side effects from either treatment before you combine the two.