If you look again, you had two replies below.
Since no one seems to have an answer right away and your Tegu obviously has some sort of condition it would best to seek professional help (a reptile vet).
Forums are generally a source for general or common information. It would seem your issue is beyond 'common' or 'general' so if you care at all for your Tegu you should call a vet immediatetly. Most decent vets who have any reptile knowledge will often give you ideas of what it could be and what the seriousness level might be right over the phone.
Keep in mind, I am not flaming you. I assume you simply overlooked the replies to your previous post, but my only concern is that you have a sick tegu and you should seriously call a vet with your issue since its not a basic question like "How large of an enclosure do I need?" ,"how do a get my tegu to eat?" etc. The longer you wait the worse your tegu could be getting.