Unique Headache Roller ball technology. Bigger ball size for application on larger area. Safe on skin & stain free. With the massage ball, make concentric circles on the designated acupressure points (temples, brows, neck, and trapezius) for approximately five seconds. If necessary, repeat. Before use, give the bottle a good shake. Quick penetration. The combination of massage, the cooling sensation of the metal roller ball, and eucalyptus and essential oils provides you with an efficient and speedy pain treatment method