To see your arms in your dream indicates that you're a responsible individual who cares for others' safety. At the same time, this dream also indicates the struggles and challenges exist in your waking life.
To dream of an injured arm means that you can't adequately care for yourself or possibly suggests your feeling of helplessness in reaching out to others.
To dream of seeing one's arm amputated foretells that the person may be facing a separation or a divorce.
To have an arm broken suggests that your ability to hold onto something has been infringed.