Sure you can have yearly improvement although I find that after a few if you do nonablative lasers like fraxels you end up getting more improvement long term. you do not need ablation/burn to get the best results long term. Dr. Emer.
Removal of syringomas with a laser should not be too difficult for an experienced laser dermatologist. Both Dr David Goldberg and Dr Roy Geronemus are very experienced and competent
Scarring requires a series of treatments. PRP post co2 helps the healing of the co2 and currently a growth factor and topical skin care products should be used. I suggest speaking to your physician for his protocol. Best, Dr. Emer.