There is minimal recovery time after PRP injections. You might have some soreness but that resolves in 24-48 hours. There is an inflammation that occurs when all the growth factors are released and this can cause soreness. There is no sun restrictions.
Recovery time depends on the extent of the PRP treatment. If PRP injections into the face along with PRP topical treatment with microneedling is done then recovery from the microneedling may take 3 to 4 days depending on how aggressive teh microneedling was. If you just had PRP injections whether mixed with filler and placement can simply be a 1 to 2 day recovery. It is not at all dangerous to be exposed to the sun after treatment but it is best to avoid sun exposure. Follow your provider's proper post-treatment instructions carefully and ask them as many questions as you need to feel comfortable with both the procedure and the provider. PRP is a safe way to allow for a natural looking improvement!