Hi and welcome. That looks like a pretty bad burn and a vet visit is the best idea. There’s always a high risk for infection with burns so along with the topical silver sulfadiazine cream, she may need an oral antibiotic too.
I have to ask what your basking temps are. Running your mister every hour is a good way to risk a different health issue. Heat + high humidity = increased risk for respiratory infection. It’s much better to make sure your basking temp remains no higher than 80 and that your basking light is elevated off the screen top. You want it so that if you place your hand below the light for a few minutes at the highest level your chameleon can reach, you won’t feel uncomfortable heat.
While we’re here, I notice that you have some artificial plants. As our veileds and especially our ladies nibble their plants, it’s best to replace the artificial with live safe plants to prevent risk of impaction. I hang my fake plants on the outside of my enclosures to give my chams a bit more privacy.
I’m curious about all of the mineral buildup on your plants and such. Are you adding anything to your water? What kind of water are you using?
