how old is the hamster?
this is signs of:
a) bordom - give hammie some fresh veg - cucumber or carrot & apple to chew on (only give this once a week) or a few toys, wooden blocks, salt licks, cuttle fish thats been washed, a toilet roll tube is always good fun,
or
b) hammies teeth need trimming - if he/she is still young they shouldnt need doing, if appropriate things are provided for him to chew on they should never need doing..
c) he simply just wants to come out and play/adventure in his new surroundings. you can buy the hamster balls to sllow him to run around in but limit this to no more than 15 mins a day. xx