Because Low-Level Laser Therapy doesn’t damage or wound skin in any way, the Laser PRO is completely safe to use immediately before or after sun exposure. In fact, using the Laser post-sun exposure will help to calm down the inflammation associated with sun exposure, though you should always protect skin from the sun with sunscreen or appropriate attire. Do not use the device if your skin is light sensitive or currently taking medication that may cause skin sensitivity to light. Doing so may result in a photosensitive reaction.