Is it coming out of her nose, or is Dino starting to shed from around the nostrils? Have you noticed Dino rubbing on anything?
I would also ask and post the picture and situation on one of the dedicated Chameleon forums for a more expert opinion, because it also could be a deadly upper respiratory infection. The Linda J. Davison book mentions:
"Probably the most serious illnesses that we have had to deal with in our animals are upper-respiratory infections. These are certain killers if not diagnosed and treated in time. Symptoms include bubbles in the mouth, or stingy mucus just under the lips at the gum line. Sometimes the keeper can hear a wheezing or popping sound coming from the lungs. Advanced stages are often demonstrated by the appearance of the animal drooling a thick clear liquid while drinking or open-mouth breathing... ... Signs to look for are the following: open-mouth breathing, sneezing, wheezing and/or forced exhalation with a rattlelike sound. Often the animal has sunken eyes, refuses to drink or eat and green or crusty yellow matter appears from the nostrils."
It might not be a bad idea to locate a Vet who specializes in reptiles. The vet we take our chameleon to is also a bird specialist, at a bird hospital.
WildBill