Shirodhara involves gently pouring liquids over the forehead (the 'third eye'). It was developed for use in restorative therapy. The name comes from the Sanskrit words shiras 'head' and dhara 'flow'. The liquids used in shirodhara can include oil, milk, buttermilk, coconut water, or even plain water. Shirodhara has been used in treatment of eye diseases, sinusitis, greying of hair, memory loss, insomnia, tinnitus, vertigo and psoriasis. It is also used at spas for its relaxing properties.