Hey everyone I need your thoughts on shedding....

I am now living at a friends house and I pretty much took over looking after his BP, he used to have horrible sheds but now I'm getting him around to having good ones .... except now he has like a cut or something on the top of his head? Is that just him trying to hard to get his skin off?

I'm not really sure on what to do with it, this is the 2nd shed in a row that the cut is there ... any thoughts?