If you have pain in your arm after playing with your cell phone, it is likely that you have been playing with your cell phone for too long and your arm has been in one position for too long, causing muscle pain, or you may have cervical spondylosis from playing with your cell phone for a long time, and the cervical spine is compressing the nerve roots, causing pain in your arm. You can consider temporarily avoid playing with the phone, arm pain can be hot compresses and massage, pain can be obvious oral painkillers, such as Loftin toine extended-release tablets. Avoid playing with cell phones and rest, and the pain can be significantly improved after 2 or 3 days of adjustment. If the pain persists and does not improve, consider going to the hospital for examination. If the arm pain is considered to be caused by problems such as cervical spondylosis, a cervical MRI can be perfected to help determine accurately. Local lesions themselves may also cause arm pain, and if necessary, local films are needed to understand whether there are any significant abnormalities in the bone quality.