Magnet therapy is the application of the magnetic field of electromagnetic devices or permanent static magnets to the body for purported health benefits. These benefits may be specific, as in the case of wound healing, or more general, as for increased energy and vitality. In the latter case, malaise is sometimes described as “Magnetic Field Deficiency Syndrome”. Some practitioners assign different effects based on the orientation of the magnet; under the laws of physics, magnetic poles are symmetric. Products include: magnetic bracelets and jewelry; magnetic straps for wrists, ankles, knees, and the back; shoe insoles; mattresses; magnetic blankets (blankets with magnets woven into the material); magnetic creams; magnetic supplements; and water that has been “magnetized”. Application is usually performed by the patient.