I've had root canal on one of my teeth recently. I have an abscess on the gum. My NHS dentist wouldn't do it, so I had to have it done privately. I had the first root canal appointment done just over a week ago. The dentist mentioned that the abscess should go between now and the next appointment. It's still there however after 8 days (although smaller). I'm worried now that it hasn't worked, and I've already spent so much money on it. Does anyone know how long it should take for an abscess to go after the first root canal appointment? I've had a lot of problems with my teeth recently, so its been getting me down, and I'd rather avoid losing the tooth if possible.