Exposure Sickness (concept)
Exposure Sickness is a catchall term for a variety of ailments arising to excess exposure to Magical energies. Generally this happens due to proximity to magical places of power such as ancient temples, wayline crossings or magical battlefields, but is also found in Magi who gather excess power. It is not to be confused with ailments resulting from casting spells requiring an excess of power than what the caster possesses, which is normally called Overwhelmation.
Exposure Sickness normally begins with headaches, fevers, dizziness and vomiting. At higher levels of exposure it can manifest in the bleeding of the eyes and nose, vomiting of blood, hair and skin loss, and the sloughing of skin. Mutations are common at heightened levels, and at the highest levels of exposure, it has been reported that the afflicted can disintegrate, spontaneously combust, melt, or quite literally explode, assuming they do not simply expire.