###Human: What is causing chest pain while breathing and movement of right arm? ###Assistant: Hi. Pain in right side of chest with breathing movements and nausea shows that you have some chest infection. Please follow this. X-ray chest to rule out infection, take tablet Zanaflex 2 mg three times a day till you get the report of X-ray (minimum three days). If pain improves and X-ray is clear this means its simply due to muscle spasm. If X-ray shows infection or you get fever or pain does not improve on taking Zanaflex please start some antibiotic like Azomax 250 mg after every 12 hours for a week.