First, through surgery, the forehead skin is tightened, that is, the forehead wrinkles are removed, and the forehead muscles are partially cut off to widen the forehead. It is the biggest operation and more harmful among the three methods.
The second is to remove some hair from the forehead with laser, so that the hairline moves up and the forehead becomes wider. Need to do it many times.
Third, you can inject botulinum toxin. Just inject the frontal muscle of the forehead, the muscle will relax and the forehead will widen. But the maintenance time of this method is relatively short. About half a year.