Leopard Gecko screaming at tail

[bunnigerm]

hi! I'm new to owning reptiles and I was gifted a Leopard Gecko around 8 months ago, when he was around 4 months old, from a PetSmart, and everything has been fairly normal. But recently I've noticed He (or she, were not sure), has been bending around to look at their tail and "screaming" or squeaking. But I can't seem to find out why anywhere on the internet. So if anyone has any suggestions on what's up, or what we should do please let me know!