Why do his arms look like that..?

This is Goji, i hatched him on november 4th. His arms have these weird bumps on the front and im nervous its MBD 😭 i have him in a nice 38x18x18 mesh wire cage and UVB lighting and a ceramic heat lamp. He moves around just fine and doesnt have any tremors or anything like that. He eats crickets dusted in calcium powder daily. But he is my first chameleon and i just want to make sure hes okay 🥺