Today a scar from an abrasion ( which got cellulitis) this past june peeled open, and a stabbing/searing pain pulsed in my scar...is that bad?

Maybe: If there's a lot of redness and pus drainage, it could be reinfected. Try to dress it and use antibiotic ointment, but go see a doctor if it gets worse!

Scar vs. Eschar: Pain secondary to superficial injuries is often more intense than deeper wounds due to close proximity to the nerve endings. That being said often times patients (and physicians as well) see tissue covering active wounds as scar or healed when in fact the wounds are continuing and may worsen or progress. With a history of previous cellulitis this should probably be checked professionally.

3 possibilities: What was the cause and where is the wound 1. A foreign body was lodged under the skin and either worked its way out or became infected, or was never infected but inflamed in the first place 2. That wasn't scar but some dead material called escar 3. Infection of underlying tissue or bone below the site with this scenario it would be worth your time to see a wound specialist i am in lafayette.