Hector I think to get better help you will need to post more in depth about your husbandry.
Lighting that you use.
Cage size and type.
Temperatures:ambient and basking (if using)
Humidity
How do you have the cage decorated: plants, vines, branches...etc..
Misting schedule: how long, how often
Supplements: what kinds, how often
Feeders: what do you use, what size, how much, how often
A whole number of things could be wrong. Somethings could require a trip to the vet. Some other stuff could be as easy as moving the cage around a bit. With more information I think you will be able to figure out what to do to help your chameleon out best.