Right shoulder pain after early gastric cancer surgery may be due to metastasis or other causes of shoulder injury, the details vary from person to person. After early gastric cancer surgery, if there is pain in the right shoulder, it may be due to spinal metastasis of cancer cells, and if it spreads to the position of shoulder and neck, it can trigger obvious pain; in addition, when the cancer cells metastasize to the abdominal cavity, it can also cause radiating pain in the back of the shoulder, and it is recommended to go to the hospital for a comprehensive examination of the specific nature of metastasis. Besides, some other causes of diseases may also lead to right shoulder pain after early gastric cancer surgery, such as frozen shoulder and muscle strain caused by long-term sedentary or upper limb movement. Some traumatic injuries that lead to injury or tear of tendon of right shoulder may also trigger pain in right shoulder. Therefore, if you have right shoulder pain after early gastric cancer surgery, you should consult the doctor in time and have relevant examination to clarify the cause so as not to delay the condition.