Head massagers include handheld units with rotating silicone "fingers", often usable in the shower, and helmet-style devices with air bags, vibration and heat. People who feel stressed or sit at a computer for long periods often enjoy the relaxing feel. Check water resistance if you want to use it while washing your hair, soft silicone tips that do not scratch, and battery and charging. A head massager does not treat headaches; a sudden or severe headache with vomiting, fever, blurred vision or weakness needs urgent medical care. The list is ranked by the independent usdxu score.