How long it take for the face to recovery and go to work after PRP injection? Is it dangerous to be expose to the sun?

Most people can go back to work the next day, although some people will develop some facial swelling and or bruising which will improve in 2 to 3 days. Sun exposure is to be avoided but is not dangerous

Thank you for your question about the PRP (Platelet Rich Plasma) procedures.  Typically it is done by way of drawing the patient's blood, spinning it down in a centrifuge, drawing off the layer of Platelet Rich Plasma, then microneedling it into the skin.  The PRP can also be injected into areas of the skin, including the scalp....which helps with hair rejuvenation.  By using a patients own PRP you can get the benefits of their own growth factors which can stimulate collagen production.  This will decrease fine lines and wrinkles, improve skin texture and tone, minimize pores, even treat acne scarring and stretch marks.  When using the PRP (platelet rich plasma) microneedling technology for facial rejuvenation it is likely you would need 1-2 a year to achieve and maintain desired results.  For hair rejuvenation, scar treatment, stretch mark treatment, or treatment of melasma/pigment issues it will likely take multiple consecutive treaments.  There is little to no down-time with PRP microneedling, but avoiding the sun is always a good idea after any facial cosmetic procedures.  With injections there is aslo always risk of bruising and swelling.  
To be sure, see two or more experienced, licensed and board-certified providers in your area for a complete evaluation to make sure you are a good candidate and that it is safe for you to have treatment. I hope this helps.
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If a well trained physician uses a cannula for injections there is no downtime.  Adding microneedling gives only a few hours of downtime and redness the next day.  I suggest going to an expert, this is something that requires skill but can give amazing results with little risk.  Best, Dr. Emer.

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!