How long is he?
If you are worried and he doesnt go still then I would give him a soak in the tub with warm water, also if he is shedding a nice soak will make it easier to shed.
Whats his weight?
I have a 4 month old that is 152g male,1 year old female 455g, 2 year old female 455g just out of brumation, 2.3year old male 475g just out of brumation.
My dragons starting from youngest to oldest in size 16.5 inches he eats supers veggies silk worms no crickets, 19 inches she eats the same, 21 inches she eats veggies supers every 2 days alongwith horns silks, 23 inches male veggies when I can get him too horns silks supers chicken veg baby food.