text: is it true that if you scratch off your dandruff from your head it only worsens the condition? please explain.   well it doesn't worsen your condition, although it may irritate your scalp (and the flakes may fall on your clothes making it appear worse).  common dandruff is thought to be caused by a fungus, so use of a medicated shampoo (such as neutrogena t/gel or nizoral) will help. use it every day until the flakes are under control, and then once or twice a week afterward to keep it under control.