I'm 25 yrs old and have a trauma-related zygomatic arch asymmetry. Any treatment suggestions? (photos)

Fillers are best to treat this, but to understand that anatomy thats left an X ray or CT scan would be helpful.  I suggest going to a filler expert and seeing their opinions.  Best, Dr. Emer.

In the setting of a history of facial trauma, appropriate radiographic study (CT scan) is needed to properly evaluate the skeletal structure.  Once this is information is obtained, we can determine what type of surgical intervention may be beneficial.  The CT data may be used to perform pre-operative virtual surgical planning which allows precise bone cuts and repositioning.  This is quite an invasive intervention so you may select to undergo a "camouflage" procedure with the use of injectable or alloplastic implant- which can be custom made.  I would recommend you see a Board Certified Plastic Surgeon who specialize in Craniofacial Surgery.  Good luck.

For a prominent zygomatic arch, an osteotomy would be needed. But for a depressed zygomatic arch, which is not uncommon after a traumatic inure/fracture, augmentation is needed. This can be accomplished by a variety of injectable fillers or an actual zygomatic arch implant which offers permanent volume enhancement.