I fell off my bike and I have a bald spot. Will it ever grow back?

transplant is the ultimate solution, but other treatments like prp, progesterone, and rogaine are successful.  Best, Dr. Emer.

Bald spot from trauma will not likely grow back.  You can try waiting a year but hairs do not grow back on the scar.

It is going to depend upon when the injury occurred.If it was within the past 6 months to a year, then there is a chance it will regrow.Beyond one year, you probably won't see anything.John Frank, MDNew YorkOhio

 If you have recently had an injury, the hair may grow back (although it may grow back thinner or a slightly different texture).  If you have a scar with permanent hair loss, hair transplantation into a scar can yield excellent results.  Some scars (for example, thickened "rubbery" keloid-type scars), will not support new hairs, but as long as there is adequate blood supply to the scar area, individual follicular transplant is a good solution.  There may be a role for scalp micro-pigmentation (tattooing) along with transplantation to give the best appearance of density.

Dear james23231Both temporary and permanent hair loss are possible after traumatic injury such as falling off a bike. Be sure to have the area examined by a physician to ensure that there is no infection as this is the most important short term consideration. If the injury was minor and affecting mostly the upper skin layers, hair may grow back. Deeper injuries are often associated with permanent hair loss. Your physician can guide you as to whether hair loss is permanent or temporary. In general, if hair loss remains at a time one year after your injury, it is likely permanent. There are options for permanent injuries, including hair transplantation and scalp micro pigmentation.Hoping this is helpful,

Bald scars on the head are usually permanent, however you can wait for a few months to see if it decrease in size.  If it doesn't go away, you can consult a specialist to wither do a scar removal or hair transplant on the scar. 

You were not clear when this happened. If it is recent, then just wait it out. If if happened more than a year ago and the bald spot it large, you need to see a doctor to see if the bald spot is really produced by the fall of if it is produced by some disease that can do just that.  There is no substitute for seeing a doctor