This hair loss question was answered by Dr. Glenn Charles of Florida who is a member of the Coalition of Independent Hair Restoration Physicians. His professional answer is below.
How long does it typically take hair transplant shock loss around the recipient area to grow back (assuming it does)?
Some of the hairs that fall out due to post hair transplant telogen effluvium known as shock loss will grow back just before or at the same time as the transplanted hairs – 3-5 months after the procedure. In cases where there are a lot of very weak, thin, dying hairs in the recipient area some of the shocked hairs will be lost permanently. There is no current way to determine which hair loss patients will get shock loss and of those who do, how much is permanent loss versus temporary loss.
Dr. Glenn Charles, D.O.