Is it normal to have a yellow scab that turning greenish over the surgical inscion?

Hello.  Your question is a common one.  The most important concept when it comes to scabs is to leave the scab alone.  Do not pick at it, feel it, or do anything to it that has not been ordered by your doctor.  That being said, scabs can have different colors, especially if they get wet or are treated with hydrogen peroxide.  The real issue is if the tissue around the scab is swollen, red, irritated or hot.  These are warning signs and should be immediately brought to the attention of your surgeon.

Thank you for your question.  Please could you provide photos of the concerned area.  Unfortunately, with examination is it hard to advise.  Please do contact your surgeon so they can suggest their protocol.  All The Best 

A photograph of the area of concern on your face after your facelift 12 days ago would be helpful to give you the best advice.  Bruising frequently will go through color changes including yellow and green.  A scab will not necessarily change color but it should improve over time as the healing occurs.  I would recommend contacting your surgeon so that you can be evaluated to determine if your healing is progressing as expected.  

An assessment by your physician is always important, However what you’re likely describing is a dissolvable stitch. Most dissolvable stitches are clear or clear yellow, as they dissolve the form of yellow crust. This will this will likely flake off with time. At the two week mark your surgeon me lift it off or you.

This is not the usual course of healing. It needs to be assessed by your plastic surgeon. Best of luck

I would post some photos to be able to get an informed opinion. If you have any signs of infection or unusual discharge it is best to see your PS face to face for reassurance.

You should show pictures. Some drainage and crusting is normal. How much scabbing you have would make a difference in how it is managed.

Thank you for your question.  Probably not - I recommend reaching out to your surgeon to discuss your concerns and at the very least, text/email a photo of the area for evaluation.  Hope that helps, wishing you the best of luck.

Avoid picking the scab.  It is best to wash with soap and water daily to keep the area clean.  Let the area dry out, as ointment is not needed.  See your surgeon so he can advise you on care of the wounds.  

Thank you for your question.
We need to remember that during your surgery you did have an aggression on your skin, some times we need to use an electrocauthery to stop bleeding and this plus other things will damage in some degree the skin (which is normal and expected ).
Please just take a close look on this, and keep it as clean and dry as possible.
Whatcha for signs of infection: redness, increasing pain, fever. If any of those happen please go an see your doctor.