Teeth are being a pain... still

My upper molar (the one which had the second part of the root canal done the other day) is still aching a bit, but less so than yesterday.

It seems that the gum just above the tooth hurts a bit when touched or pressed.

The actual treatment was not painful at all (surprisingly) - it's just afterwards that is when you get the pain.

After the anaesthetic wears off, the drilling right inside the tooth, right to the bottom of the root is what causes the pain later - the tooth is rather traumatised by all the sharp drills and having part of its enamel and dentine removed is a traumatic experience for living tissue and teeth are living tissue!

I know that a tooth that has its root removed is technically no longer alive, but it still gets some sort of blood supply and is still in contact with other teeth, nerves, tissue around it - the other nerves around the root of the tooth may also get traumatised by the vibration of the drilling, which can be causing my pain now. That's the only explanation I have for it to be still painful!