Well, if this picture was taken at daytime and he's sleeping on his branch this could be an indication that something's off...
Maybe you can post a better picture and more info on your husbandry (Fill out the how to ask for help form in the health section).
◦ Your Chameleon - The species, sex, and age of your chameleon. How long has it been in your care?
◦ Handling - How often do you handle your chameleon?
◦ Feeding - What are you feeding your cham? What amount? What is the schedule? How are you gut-loading your feeders?
◦ Supplements - What brand and type of calcium and vitamin products are you dusting your feeders with and what is the schedule?
◦ Watering - What kind of watering technique do you use? How often and how long to you mist? Do you see your chameleon drinking?
◦ Fecal Description - Briefly note colors and consistency from recent droppings. Has this chameleon ever been tested for parasites?
◦ History - Any previous information about your cham that might be useful to others when trying to help you.
Cage Info:
◦ Cage Type - Describe your cage (Glass, Screen, Combo?) What are the dimensions?
◦ Lighting - What brand, model, and types of lighting are you using? What is your daily lighting schedule?
◦ Temperature - What temp range have you created (cage floor to basking spot)? Lowest overnight temp? How do you measure these temps?
◦ Humidity - What are your humidity levels? How are you creating and maintaining these levels? What do you use to measure humidity?
◦ Plants - Are you using live plants? If so, what kind?
◦ Placement - Where is your cage located? Is it near any fans, air vents, or high traffic areas? At what height is the top of the cage relative to your room floor?
◦ Location - Where are you geographically located?
Current Problem - The current problem you are concerned about.
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Please Note:
1 The more details you provide the better and more accurate help you will receive.