Hair loss after head trauma
	
	
		About 3 weeks ago I was Care Flighted due to serious head trauma.  I had a V-shaped laceration in which 8 staples were put in.  I was very thankful that I recovered quickly and now back to normal with the exception of some missing hair around the impact area.  Here are some pictures.  
1 week after
http://www.flickr.com/photos/13688743@N05/3950308003/
3 weeks after
http://www.flickr.com/photos/13688743@N05/3950308003/
I've never had hair loss.  I'm 25 years old and a little concerned. 
What is the reason for this and is there anything I can do?
Thanks!