White spot on the middle of my bp's head?

Can anyone tell me what this is please?
This appeared about a month ago.
Thanks!
http://i852.photobucket.com/albums/a...36F9A5930C.jpg

It looks like a scale fell out, but also looks like some lind of lump is there, others have had this same experience, chime in!

What are causes of scale loss?
Thanks btw!

It looks like like a rub spot, I had some of my snakes get a simular spot from rubbing thier heads on the top of the containers. A smooth lid cured it.

Right, im pretty sure thats the case then. Thanks bud!

Jeanus got it right you see this all the time in adult male retics that are pushing during breeding season. He/She is probably doing so out of hunger/thirst or something about the condition/climate of the cage is off.