Pain on the top of the right side of the back generally has the following causes: 1. myofasciitis, when myofasciitis occurs there will be significant pain in the back, often with a trigger point. It is commonly associated with long-term exertion or after cold, and can be accompanied by numbness and weakness of the ipsilateral upper limbs, especially at night when sleeping pain is very obvious, often with a long course of disease. 2, may be the scapula or rib tumor, if the scapula, rib own tumor or metastatic tumor, there will be pain in the distribution area of the back. 3, may be cholecystitis or gallbladder stones reflexive appear 4.Pulmonary diseases, when there is inflammation or tumor in the upper lobe of the lung and the tip of the lung, there will also be obvious pain in the upper right back.