Arm pain is recommended not to receive booster shots for the time being in case of discomfort. 1. As the arm pain may overlap with the immune response caused by booster shots, it is not conducive to the observation of the condition. It is recommended that you receive a booster injection after the symptoms of arm pain have subsided. 2. There are many causes of arm pain, including trauma and cervical spondylosis. Vaccination may cause arm pain, and it is not easy to distinguish between the two. 3. Arm pain may indicate a decrease in the body’s immune function, affecting the production of relevant antibodies after vaccination, and failing to protect the body from infection. Therefore, before the cause of arm pain is fully clarified, the effect of booster vaccination may be affected. Usually, before vaccination, one should maintain good physical condition, which is conducive to short-term observation after vaccination.