What can I do about my narrow/small jaw? (Photo)

Good idea to consult with an orthodontist. The orthodontist can do imaging that can assess deficiencies in growth. Often times jaw surgery and facial implants are done at the same time by an oral and maxillofacial surgeon.

You have a vertical facial growth pattern whi h results in a narrow lower jaw emphasizing a 'long' face look. If the bite is fine you can consider jawline augmentation which will properly contour the jawline from the angle to the chin and alter.the overall balance naturally