Q: In my first hair transplantation procedure, I wanted to be as conservative as possible and focus on thickening the thinning hair on top of my head and lowering the hairline minimally. Is it still possible to lower the hairline further in a second hair restoration procedure? Is there an “ideal” time period for a second hair transplant after the first? — B.B., Meatpacking, N.Y.

A: It is possible to lower the hairline with a second hair transplant, but the doctor must be certain that you have enough donor hair so that the transplanted pattern will look natural long-term.

Unless there is some pressing reason that you had to have a second session sooner, I would wait a minimum of 10-12 months between hair restoration procedures so that you can see the full cosmetic impact of the first session.

As a hair transplant matures and thickens, the hairline will look lower as the eye doesn’t see as far into the scalp.