To take care the problem is simple there is some tips for that:
- don't scratch your head too much, this require clean head (no scalp) so you must wash it at least one time for 3 day
- don't use too much jell or anything to your hair
- and the last one if you have scarce hair or bald then you can try using aloe vera, just peel the leaf and get the liquid and rub it to place that you think it's need more hair growth and leave it be for a night and wash it the next morning.
By the way aloe vera is also capable to help the growth of hair not only on head but it's also able to help growth mustache, beard, and other.