What could be causing pain and weakness in the right arm?

It is usually caused by maintaining the same posture for a prolonged period, leading to temporary ischemia, hypoxia, numbness, and restricted movement. Symptoms will quickly disappear after a period of heat application and massage. For cervical spine problems resulting from long-term work, an X-ray examination can be performed followed by appropriate treatment, such as acupuncture, moxibustion, neck and shoulder massage, and other routine neck care.