... spend long-time at their desks, so the neck, shoulder and waist muscles always stay tense, blood ... locally, or it may radiate to the occiput, shoulder, scapula, or arm, and bring on arm ... the product.4.Avoid direct sunlight and heat.5.Only use the product on the ... joint instability, uncertain diagnosis (eg, may be cancer), neck blood vessel problem, (include Dizziness, coma) temporomandibularjoint ...