0Hi,02br 02br 00'Hand' is the part of your body that has 4 fingers and a thumb. 05002br 02br 00'Arm' refers to everything that comes from your shoulder, including your hand, eg the machine cut his arm off.02br 02br 00But 'arm' may also be used in a context where it excludes your hand, eg I have a pain in my arm, but my hand feels OK.