To 'undo' the ignore button, go to your profile. As soon as you get there, look to the right on the 'bar of buttons' - the furtherest one on the right will say "Edit ignored users" - there you can un-check anyone that you didn't mean to set for ignore!!
I would suggest that you use heat for the paint that you have described. It definitely sounds like nerve pain, and maybe sciatic nerve pain. If the heat doesn't work, then I use ice to reduce the swelling of the sheath of the nerve - it usually works for me, although sometimes there is no relief and I have to just wait it out...on a heating pad!!