Yes According to Dr. Chun Yu's information, rare earth necklaces can improve migraine without side effects, and can be worn for a long time. Rare earth necklace is a high-tech new technology product developed by technicians of Ningbo Xierkang Health Care Technology Co., Ltd. with 20 years of technical accumulation and 3 years of technical research and development, in cooperation with many well-known universities and related technical teams.