Perceived hypersensitivity to exposure to electric and magnetic fields (EMFs) is described mainly by subjective symptoms (redness, tingling, burning, dryness of the skin) as well as by fatigue, tiredness, concentration difficulties, dizziness, nausea, heart palpitation, and digestive disturbances. It appears that hypersensitivity to electric and magnetic fields is an unclear health problem whose cause has yet to be determined.