sickness?

Question
Hi
My snake (african house snake ) have fron 2 days some yellow spot on the head.skin its normal and snakes eats good , can you tell me its some sickness or thats something other.
thats pictures http://www3.telus.net/public/t2025375/pictures/121_2184.JPG
http://www3.telus.net/public/t2025375/pictures/121_2185.JPG
thank you for help and sorry about my english

Answer
Hi there, the only thing I can suggest is that it may be a thermal burn. Snakes can change colour but it doesnt happen very suddenly. If you have a light bulb that is not covered by a guard or a heat mat that does not have a thermostat then I would advise doing this. Good luck