The function of shoulder and neck patch is mainly to invigorate blood circulation, relax muscles and relieve pain in the neck and shoulder area, which contains herbal ingredients to invigorate blood circulation, relieve muscles and relieve pain, such as Xinyin Cao, Turbinate Cao, Peach kernel, Safflower, Mugwort leaf and Ginger, etc., which can effectively activate blood, reduce swelling and relieve pain, increase local blood circulation, promote the metabolism of inflammatory metabolites, increase arterial blood supply and promote local recovery of the location of the lesion. With increased venous return, inflammation will not accumulate and inflammatory edema can be significantly reduced, which helps to relieve local pain and unfavorable movement symptoms. Shoulder and neck patches have a thermogenic effect, usually because the magnetic therapy reaction can generate local heat, so that the muscle tissue will become more relaxed, and also accelerate the surrounding blood circulation, effectively promote arterial blood supply and venous return, reduce the local inflammatory lesions, and reduce pain.