It is true that prolonged use of helmets can cause an increase in the rate of hair loss in men. There are a few reasons for this. When the helmet sits on top of the head, it will move slightly along with the jerking of the motorcycle. The helmet will pull the hair along with it due to friction. When this happens for a long time, hair loss its anchoring in the scalp. Another important reason is the sweating due to the lack of movement of air. This is an ideal condition for bacteria to grow on the scalp. Thus an unhealthy and malnourished scalp accelerates hair loss.