Tail base pulsating.

[Aidenb]

I just got a baby argentine black and white and have noticed that once in a while his tail base kind of pulsates (best way I can describe it). Any idea what this could be? He ate 3 small hornworms with calcium powder on them today.

 

[tegumomma]

Is this pulsating happening when you're near the tegu and attempting to handle it?

 

[misterpc23]

When I see my tegus tail undulating that means shes either upset with me and is trying to scare my off or something, shes about to attack her food, or shes about to poop