Wearing magnetic jewelry is a completely safe, drug free way to manage pain. There are no adverse side effects and it is safe to wear any number of magnets -- or magnetic jewelry items -- at any magnetic strength. There have been rare cases reported where there was a redness on the skin or slight bruising where the magnetic jewelry was worn. A warm feeling on the skin where the magnets were worn has also been reported during the first few days the jewelry is worn. These have all been attributed to the increased circulation of blood caused by the magnets and compare to an improvement in circulation that comes with exercise. PLEASE NOTE: Magnetic jewelry should not be worn by persons with implantable pacemakers, defibrillators, infusion pumps or other electromechanical devices and should be kept at least 18" away from these devices. Magnetic jewelry should not be worn during pregnancy.