Why is my bearded dragon acting this way?

i have a male bearded dragon who is normally active. lately he has been really overly active constantly scratching at the glass, jumping around hardly basking, his temoratures are all ok and he is hardly eating, he normally eats quite alot, now he'll only eat a few morio worms and his greens, yesterday he ate 2 locust. he wont touch his crickets though. anyone have any ideas what could be wrong?