Do not blow on his head "Inflatable Air Blower": Experts advise that if a fan blowing directly on his head and neck, scalp temperature drops, the reflection caused by cerebral vasoconstriction, cerebral blood flow is also reduced, determined to cerebrovascular disease for the elderly is concerned, can induce severe stroke. Do not blow against a single shot from the side: If the "Inflatable Air Blower" against unilateral facial blow, but also raised the risk of facial paralysis, facial paralysis, although the cause is unknown, but is now recognized as one of the incentives of local cold. Because the cold makes neurotrophic vessels spasm contraction, leading to nerve ischemia and hypoxia, edema, swelling, pressure variability and other changes. Experts suggest, "Inflatable Air Blower" should preferably be able to shake his head in. Suitable from foot while sleeping fan blowing, so the body will cool faster.