If you have arm pain while doing heavy work, first of all, you need to rule out any muscle strain caused by excessive force. If there is a muscle strain, generally need to rest and brake for a period of time, within 24 hours need to carry out local cold compresses, you can use ice bags cold compresses, you can also buy cold compresses external; after 24 hours, you can do the local heat compresses, you can also use some blood circulation drugs for treatment. If the pain is obvious, you can apply topical Furtalin cream, generally recuperate for a period of time will slowly improve. This situation also needs to exclude the problem of cervical spine lesions, if there is a long time low head and other bad posture habits, it is easy to lead to cervical spine lesions, compression of nerves can be radiated to the arm to cause pain and discomfort symptoms. If the aggravation can be induced when doing heavy work, you need to do a CT examination of the cervical spine to rule it out.