As this can very likely be just a symptom of some emotional disorder you could do worse than start here:
http://www.emiratesspecialneeds.com/contactus.asp
For example on their website they even have a list:
OBESITY MANAGEMENT
Consultant Physicians 04 36229999
Dr. Sulaiman Al Habib Medical Centre 04 4297777
Emirates Hospital Dubai – 04 3496666
Emirates Hospital Abu Dhabi -2 4466648
Rochester Wellness Jumeirah 04 394 2257 / 043942278
Synergy Integrated Medical Centre -4 3485452
Good luck.