What is wrong with my face? One side flatter than the other. (Photos)

Everyone has some facial asymmetries. Symmetry and contouring of the face can be improved with well-placed fillers (Voluma, Radiesse, Bellafill) and Sculptra. Fat or implants are alternatives. I recommend getting a formal evaluation with a facial sculpting expert. Best, Dr. Emer

Hello, Thank you for your question and picture. Based on what can be seen, dermal fillers can help make your features more symmetrical. There are more drastic options that involve surgery. You will need to consult with a local physician in person to determine the best course of action based on your concerns and expectations. Good luck! 

Facial asymmetries are normal. Both implants and fillers in the cheeks can create good results for patients.  Both can build up the cheeks and create symmetry.  You must balance the pros and cons of each procedure and do what you feel is the best decision for you.
Fillers:
Pros: No downtime Reversible Quick
Cons: Temporary More expensive in long run
Implants Pros: Permanent Great for patients with poor bone structure Less expensive overtime
Negative: Risks associated with surgery Possible infection Downtime
I hope this helps.