Question Author
Ok - initially he thought it was a skin condition, as he has suffered from excema and dermatitis in the past. His forehead felt sore and he had swelling. When he went to the docs he said the swelling was actually bone, and he was developing a brow ridge. Cancer has been ruled out, as has Paget's disease. The condition is also making him very self conscious, although I have assured him it is not noticeable. He is as you might imagine quite fearful of how it might develop, as am I.
I don't feel we should have to go down the road of private medicine as we don't have a lot of money and who knows where it will lead.