下肢水肿的病因较多,在老年人和有基础疾病的患者中常常是多因素性的。急性下肢水肿,无论是单侧和双侧,都需要考虑到急性深静脉血栓的可能性;慢性血管性疾病的水肿通常表现为单侧下肢、非凹陷性水肿,且睡觉后能明显缓解;双侧下肢水肿多考虑为全身因素。
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