Blake Fielder-Civil shaves his head because there’s pretty much nothing else to do in the slammer and it has been reported he’s not coping that well either.
A lag said:

Blake was screaming at Amy, ‘I can’t cope! There must be something you can do to get me out’.”

He added: “Christmas is always grim but Blake is finding it particularly bad. He shaved his head and had razor nicks all over it.

“He looks awful. He tells everyone he’s going back to his ‘peter,’ which is Cockney slang for cell. He wants to be accepted.”

Yes Blake, there must be something Wino can do, a psychiatrics evaluation perhaps?