Cold compresses are great aids to reduce pain and inflammation because they constrict blood vessels that cause the swelling.  However, professionals recommend not overdoing cold therapy; 15 minute applications are the maximum amount of time suggested.  Always be sure to give yourself at least 30 minute breaks between treatments.  Since icing can cause some stiffness around the joints, doctors recommend saving ice therapy for the end of your day to reduce inflammation caused during your daily activities.