Greetings. I think you are going to have to provide a lot more info about “things” and upload some pictures of your enclosure, housing, lighting, substrate, soaking, humidity levels, etc.
How small or large? New sully or one you have had for awhile? Age?
A lot more info will help folks get your Sully on track.
Soak in nice warm water. Large enclosure...increased temps and more exercise will all help.