10 days post op, should I be worried about suture track marks after upper bleph? (photos)

At ten days postop, you are healing still and not seeing your final result. Most likely these marks will fade. be patient and give yourself time to heal. If the issue persists, discuss with your surgeon.

Good question, and I can understand your concern.  At this point I would not be worried about permanent suture marks along your upper blepharoplasty incision.  From your photo, your incision is healing quite nicely, and the majority of the incision will remain hidden in a natural fold of the upper eyelid.  The skin in this area typically heals quite nicely.  My best advice is to remain very patient.  You will see the incisions and the scar fade dramatically in the coming month or two.  I hope this helps!