Scalp discoloration after FUE transplant. How long until it fades? Can I apply any products to accelerate healing?

This can be normal and sometimes is seen up to 6 months after a hair transplant.  Unfortunately there is nothing that will make it fade sooner.  Sometimes patients can use a little makeup to cover it up temporarily.  However the good news is that almost all the time it fades away.

If your doctor has examined you and said it was normal, we have to assume your doctor is right.  Your next question to your doctor should be when it will it go away.  In general red brown marks are not normal.  

This is especially true if you are getting a lot of sun exposure.  The goal is to minimize sun exposure, and consider using creams to even the tone if the sun avoidance does not work. 

I never see this type of problem and without good pictures, I can not comment on it. This is an unusal problem and considering that I my medical group has performed over 15,000 surgeries, that is quite a statement. If you sent me pictures, I might be able to comment.  I will discuss the post operative care for others who are reading this post in the hope that problem like yours, are averted. I have written about this before:An FUE is treated just like a regular hair
transplant with regard to the recipient area, but the donor area has open
wounds which require daily washing with soap and water. Within 3 days of
surgery, you can resume full activities, heavy exercises if you wish. The
recipient area requires daily washes as well to keep the recipient area free of
crusts. I generally recommend the use of a sponge and supply my patient with a
surgical sponge to fill with soapy water and press on the recipient area daily.
By repeating this daily, all crusts can be washed off without any fear of
losing grafts. IF any crust are present, use a Q tip and dip it into soapy
water, and roll it on the crusts and that will lift them off without dislodging
them, but never rub them, just roll the Q tip on the recipient crust. I like to
see no evidence of any crusting in the recipient area and the crusts from the
donor area gone in 7-10 days with daily washing,.