Need help with my baby pacman frog

Do you have any pictures?

How long have you had him?

With tongue sticking out it's usually MBD but it could be other issues as well, so taking it to the vet to get it check ASAP is not a bad idea.

Don't know, my horned frogs are very healthy but don't move around much, they'll stay in one spot for weeks on end. These frogs are ambush predators so it's their nature to stay put for long period of times. I think reason yours is moving around alot is because agitated/stressed.

it may not be your frogs tongue at all, possibly his stomach. Frogs sometimes will expel or throw up their stomachs as a means of getting rid of toxins as they cannot vomit the same as human beings do. My young pyxie frog had this issue after I fed it some bait store earthworms, it was quite disturbing to see before I had this knowledge. After I removed the substrate that was stuck to his exposed stomach with a q-tip and water, he swallowed his stomach and was ready for a meal. I have also read posts of ppl who said they fed their frogs as this was occuring and it helped by having them re-swallow their stomach as they simultaneously ate a cricket. Its a weird site but my frog appeared to be in no distress during the process. Hope this helps.