How long will the bump on my forehead stay?

Bump on forehead, ANY IDEAS?

• Hello everyone, I am writing because i have a fairly good sized bump on my forehead, that appears to be a bit swollen and puffy, but let me give you a bit of background on this bump. for a while i slept on the floor on am air mattress that tended to go flat, well, when i would sleep my head and pillow would always end up against the wall, meaning i would be on my stomach and my forehead would be against a pillow against a wall. over time, this bump occured and i don't know how to get rid of it because it is really noticeable. its red swollen and sometimes there are weird pimples on it that appear to be under the skin. i really wanna get rid of it. i now sleep on my side but occasionally catch myself in that position again. any idea what it may be?

• Answer:

  I don't know how long you've had it, but if it's been within the past week or so it could be a spider bite.