I got him yesterday from a pet store, and i have done everything properly,
but today i noticed on the understide of his back legs there is a line of bumps
going all the way across. what could this be what causes it?
Can you get a picture up or just describe in a bit more detail like how old he is or looks and how he is moving.
These bumps mean he is a male. It's fine and there is nothing to worry about it. They will also have a couple bumps behind their 'vent' which females won't have either.
Its normal don't worry. i had a few dragons with it and when i went to the pet store they said it was normal, nothing to sweat about