This is a tough question because there are so many variables that go into deciding what procedure to use. Before you decide on what kind of treatment to use, you must determine the cause of the hair loss. Hair loss can be temporary or progressive.
Temporary hair loss will usually fix itself. Things like stress, medication, hypothyroidism or traction alopecia can cause temporary hair loss. No need to worry, your hail will be back!
For those of us that aren’t so lucky, progressive hair loss is permanent unless treatment is used. Propecia, Monixidil, low level laser therapy and hair transplant surgery can slow down or reverse progressive hair loss.