tremors

After I gave my beardie a bath I put him back in his enclosure and at first it looked like he had tremors in his stomach but then it happened in his tail. Even sometimes when I hold him I can feel them moving. What should I do? Also occasionally he makes these gasping noises. Would it be be...

So I gave my bearded dragon a bath and he did a poop then I saw this purple colouration in it and I searched it up and nothing helpful came up. His poop stank but the smell died. Does he have parasites? Also since my lastest post I have stopped giving him his supplements. Should I start again...