Image of an eyebrowDescription: Whether you have sparse eyebrows from over-plucking, trauma or congenital problems, transplanting hair into the brows can help them regain a natural shape and cover up scars.

How it's done: During this hour-long procedure, hair is harvested from the scalp, separated into individual follicle units and placed into tiny incisions in the eyebrow. The transplanted hair will continue to grow for the rest of your life. But since it's scalp hair, you'll need to trim it regularly.

Complications: Minimal risk of infection.

Recovery: Swelling and scabbing around the eyes and brows may last a week. The new hair will fall out and grow back within two to three months.

Cost: $1,500 to $3,500.