Fill the form, it can be so many things and reason but from the picture
1)get the temperatures lower than that
1.1)fill the form
2)drop all your plastic plant in a garbage bag and change it for real plant (humidity keeper)
3)got a proper night drop
3.3)fill the form..
4)go with 12 hours of light 12 of darkness
5)raise the humidity during the night
6)dont forget to fill the form
This is probably right, since jackson god little pouch in the mouth natually filled with bacteria, when your husbandry is wrong, theses bacteria take over and this require medical assistance, so far this not look super bad but you need to act quick and be ready.. start to call some vet around your place and make yourself sure they know about chameleon, jacksons chameleons and temporal gland infection (if a vet fail to awnser to "what is a temporal gland infection".. then avoid this vet and call another.
In my case I noticed improvement using this in about a week, and it completely cleared up in about 3 weeks.
During this time, I also increased his vitamin supplementation, gave him way more access to natural UV and kept him on the higher end of his temperature range, all in attempts to boost his immune system response.