Its on the side of the wall in my room. I can easily wipe it but I don't know if that's safe or what. Its not black mold.. just whiteish. It always comes back in the same spot and the area behind it is clear. I'm not sure what to do.
Industrial strength chlorine will kill any mold it touches. You can get it at any pool store. Get a spray bottle and fill it with pure chlorine, spray the wall down well, let it set for 15 mins, do it again, set 15 mins, soak a rag in the chlorine and wipe down the area.
Wait an hour, then wash down the wall with bleach or a cleaner to get rid of the smell. Keep the room well ventilated when you do it.