其他
一到冬天就手脚冰凉，有可能是你生病了
入冬了，把手揣到兜里，脚上穿上厚厚的毛袜，却还是怎么都捂不热……
为什么有人一到冬天就手脚冰凉？会不会是某种疾病呢？
大多数手脚冰凉不是疾病
For our bodies, blood is a fantastic store of heat. By diverting blood to the skin, heat is transferred to the outside air, helping to cool us down. This is why we might look a bit "flushed" on a hot day.
On the other hand, when we are feeling cold, the blood vessels in our skin narrow so less blood is diverted there. Less blood means less warmth, and this becomes particularly noticeable in the hands and feet.
留心雷诺氏现象
Moreoften, though, they are signs of Raynaud's phenomenon, a common, generally benign condition that causes the blood vessels in the fingers and toes to be overly constricted. benign: /bɪˈnaɪn/ adj. 良性的
当四肢暴露在寒冷环境中，患有雷诺氏症状的患者血管会过度收缩。虽然血管本就会因寒冷而收缩，但在这种情况下，血管则处于几乎完全封闭的状态，导致血液无法通过，四肢更觉得寒冷。因此，皮肤的颜色会出现一些显著的变化，比如手指、脚趾会发白、发蓝甚至发紫。
It's when the blood vessels in your extremities constrict a bit too much from cold exposure. And although blood vessels are supposed to constrict from the cold, with this condition they almost completely close. This then stops blood from flowing to these areas, making them feel even colder. This can also lead to some quite striking color changes in the skin. Fingers or toes can turn white, blue, and purple.
extremitie: /iks'tremitis/ n. 四肢
Pain and tingling in the fingers, hands, and feet
Discoloration of the fingertips and toes (paleness, redness, even blue)指尖、脚尖是否变色（变白、红甚至发蓝）
Thickened skin in the fingers and toes手和脚上的皮肤变厚
Most people with this condition have primary Raynaud's phenomenon, which is often mild and does not have a clear underlying cause.
In other instances, it may be a result of more serious underlying causes, such as an immune deficiency or associated with high blood pressure.
Depending on how bad your symptoms are, treatment may range from wearing extra gloves and socks to taking prescription meds that relax blood vessels.
如何缓解手脚冰凉
Pop on a pair of thick socks and wear gloves.
▌用温水洗手，洗完后迅速擦干。
Wash your hands in warm water and immediately dry them afterwards.
▌添衣保暖，保持体内温度，避免温度的急剧变化。
Avoid abrupt changes in temperature by wearing layers of warm clothing to maintain your core temperature.
▌情况允许的话，找个能照到阳光的地方，而不是待在空调房里。
Steer clear of air-conditioned rooms where possible and find cozy spots in the sun during the day.
In the long term, improving your circulation is key. It helps warm your hands and feet, by ensuring the body efficiently pumps blood to where it needs to go. This can be achieved with daily exercise, moving around at regular intervals during the day, and stretching your arms and legs.
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