Left side of neck still feels bruised. I wonder if this may be related to a strange infection I got about 8 years or more ago, where the lymph node in my neck on that side became swollen, and I got a skin erruption around my left eye. This may have been shingles. No fever though. Problem went away after about 5 days. This incident may have been what injured the left carotid. If it was shingles, maybe I have now re-activated it, but the high does VC is keeping it in check.
Either that or I have stripped off more plaque than I intended to at the carotid, so it is feeling a bit raw until the VC repairs it with collagen. So I am upping my VC and hydolysed collegen intake.