Is it okay to have mesotherapy when on azathioprine for Crohn's disease

Hi there, Many thanks for your question. 
Unfortunately you would not be able to have Mesotherapy when on azathiprine. I would personally recommend to avoid fillers and other injectables while on this medication. The only injectable to really consider would be Botox but you should seek a medical opinion before undertaking any procedure. 
Best of luck. 

Sorry to say but any chronic inflammatory disease would contraindicate injectable aesthetic procedures. 
If it is still something you would like to explore, then I would recommend you enquire as to which mesotherapy product would be used and ask for the opinion of your gastro consultant. 
Best of luck