Grading & Level of Importance: A
冻瘃。
由寒冷引起的红蓝色丘疹或结节，质硬，好发于下肢或足部。 女性比男性多发。
持续暴露于寒冷和潮湿环境使人易患冻疮，通常在数天至数周后发病。
红蓝色水肿性丘疹或结节，有时伴触痛或疼痛。
典型部位为肢端，常发生于远端、易变凉的部位，尤其是胫前、股部（骑手好发股外侧）、手指和足趾。潮湿也是重要因素之一（有些职业具有特殊风险，如屠夫和农民）。
复发性，常见于春季和秋季（冷湿气候）
偶尔合并溃疡。
依据组织病理、部位和临床特点。
结节病冻疮样狼疮（Lupus pernio）亚型，红斑狼疮冻疮样狼疮（chilblain lupus）亚型。
穿着暖和防水衣物，局部或系统应用血液循环刺激制剂，必要时穿弹力长袜。
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