I don't really know what starts it, but the edges of the cutiles comes up, and it isn't smooth, and it needs to DIE!? So you tear off that dead skin and usually take up some live skin with it.? And then that dries and peels, and it becomes unsmooth, so that needs to die too.? So you end up tearing off half the end of your finger until the pain becomes too great to pull off more skin, or you manage to ignore it until it heals.? Another reason I should not take pain killers.
Also i'm getting on another yummy smell. Not currently strong, but it is there, smells kind of like vegatable beef with a hint of mcdonalds.