When will the redness in my donor area disappear and will my hair grow again? (Photos)

It is best to contact your doctor about post operative care and instructions since each doctor has a different regimen.  Redness can be a sign of infection.  Please get in touch with your doctor.

Thank you for your question. 
With FUE hair transplant the area of the donor site is much larger as the grafts are not taken as a single strip. This area of redness will therefore will be greater and generally for most surgery, the area of operation and scarring can be red for atleast 3 months. 
With hair transplant, the scalp is injected with solution that makes it swell. This will take time to settle and the body will eventually absorb it. Consequently, the redness takes a bit longer to settle down. 
If it is quite obvious, then you can consider using a concealer that is water based - this can be to specific skin colour types and can help to soften the red appearance.
With FUE, when the hair is taken, this donor area will not regrow hair as the follicle and root has been removed. With large volume FUE this can lead to a thinning appearance to the back of the head. 
I hope this is helpful for you 
BW
Rohit Seth
Plastic, Reconstructive, Aesthetic and hair transplant surgery
Bella Vou Cosmetic Clinic

There are many factors that affect the redness in the donor area (e.g. amount of hair removed, punch sizes, skin type, etc.).  The redness improves over time sometimes taking 6 months or more to resolve if a large case size was perform. The donor area regains its "normal" appearance in as much time depending on how much hair was harvested.  Only the hair that wasn't harvested will grow back.  The hair that was removed (harvested) won't grow back in the donor area.