Your body will even release endorphins, natural painkillers that promote an increased sense of well-being.

身体甚至释放内啡肽，是能提升身体免疫力的天然止痛药。

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And smiling has been clinically shown to lower blood pressure, boost immunity, and even release natural painkillers (endorphins), each of which lowers stress, boosts happiness, and improves health.

微笑在临床上的表现能降低血压，提高免疫力，甚至还能释放出天然止痛药(内啡肽)，这每样都能减轻压力、增加快乐和促进健康。

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It reduces muscle tension, distracts attention from the pain, has a positive effect on a person's attitude and can actually stimulate the release of endorphins, the body's natural painkillers.

它降低肌肉紧张，分散注意力从疼痛，产生了积极影响一个人的态度，实际上可以刺激释放内啡肽，身体的天然止痛药。

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It is thought that a build up of chemicals like dopamine suppresses the activity of the brain's natural painkillers - the endogenous opioids.

BBC: Gene controls pain threshold

What he found was that when the placebo was being administered and the subjects were informed when it was their brains released significantly more endorphins, the brain's natural painkillers.

ECONOMIST: Pain perception