即使没有处于寒冷环境也出现手冰凉情况，这也是正常的。手冰凉通常只是身体控制体温的一种方式，不必过于担心。
然而，持续的手冰凉（尤其是伴有皮肤颜色变化时）可能是神经损伤、血液流动问题或者是手或手指组织损伤的警示迹象。例如，如果您在极为寒冷的天气中身处室外且出现手冰凉，皮肤颜色的变化可能是冻伤的一个警示迹象。
出现手冰凉时要注意的体征和症状包括：
- 脚部或脚趾冰凉
- 手表面皮肤颜色发生变化
- 麻木感或刺痛感
- 开放性疮口或水疱
- 皮肤紧绷或硬化
手冰凉可能是由于处于寒冷的房间或其他寒冷的环境中。手冰凉通常是身体试图维持正常体温的一种迹象。
然而，总是手冰凉可能意味着血液流动或手部血管出现了问题。
如果您对经常出现手冰凉的状况感到担心，请预约就医。医务人员可以检查您的手冰凉状况是否由血液流动或神经问题引起。治疗主要是针对您手冰凉的基础病因进行。根据您的状况，医务人员可能建议改变生活方式，以辅助改善症状。
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Original article: https://www.mayoclinic.org/zh-hans/symptoms/cold-hands/basics/when-to-see-doctor/sym-20050648