Raynaud's phenomenon is a common condition of episodic color changes and cold temperature of the hands, typically induced by exposure to cold. Less frequently, the feet, nose or ears can be involved. This condition often associates with other medical conditions, most commonly with rheumatologic diseases including rheumatoid arthritis, lupus and scleroderma. Raynaud's can be seen associated with non-rheumatologic health problems including thoracic outlet syndrome, peripheral vascular disease and following severe frostbite or vibration injury (e.g. jack hammer operator). It may be induced by some medications. Also, Raynaud's can occur without association to other medical conditions, in which case episodes may also be precipitated by stressful situations. Typically, the symptoms are mild and bothersome, but do not require medical intervention.