Most likely Not an issue .... even little hatchlings enjoy siestas after a big feed.
But just incase , we need much more information and details on your beardie's setup and your husbandry otherwise we can't even hazard a guess.
Here's my Cheat Sheet :
viewtopic.php?f=6&t=234738&p=1806050#p1806050
If you work through it methodically , the chances are their are likely a lot of issues that need to be tweeked or changed and they will pop right out at you, if you can give very detailed answers we will then be in a position to offer help. Is impossible to help you if you don't provide thorough details .
It may prove necessary to involve a reptile vet if your bearded dragon has serious health issues.Are you in a position to afford to take him to a good reptile vet should this prove necessary ?