Jaw Angle Implant: Acute swelling randomly twice 6 months and 10 months post-op. Is this normal?

I had jaw angle implant place on one side of my jaw. It healed well initial swelling subsided. However about 6 months later it became quite swollen again for a few days I just iced it took antibiotics and anti-inflammatories and it went back to normal again then 2 or 3 months later same thing happened. Is this normal say if I slept on it in a funny way? I can't pin point exactly how I have aggravated it either sleeping or maybe straining when working out... any thoughts would be great!