Image is not real but a rough idea of whats happening. As you can see the paint is cracking because mold is growing behind it and pushing out. If the mold was coming from the room I imagine it would be on the surface.
Since it is developing as a lump and pushing the paint out does it mean the mold is growing from inside the wall?
I have added an image where the mold was. Mold was here and pushed/cracked the paint out. It has now occurred to me the wall seems to have paint, followed by paper(as you can see) and the wall underneath isnt hard- its quite soft and knocky. The mold has been cleaned off. from the pic are you able to tell if this is just a surface issue? There is another crack further down but it was making me so sick I couldn't get close enough to take a pic.