概述
偏侧面肌痉挛是一种神经系统疾病，表现为一侧面部肌肉不自主地抽搐。偏侧面肌痉挛大多由血管接触面神经或搏动压迫面神经引起。也可能由面神经损伤或肿瘤引起。有时也可能原因不明。
症状
偏侧面肌痉挛的常见症状包括面部肌肉抽搐，通常具有如下特征：
这些肌肉运动（收缩）通常始于眼睑。然后可能发展至面部同一侧的脸颊和嘴巴。偏侧面肌痉挛起初时有时无，但数月至数年后，其可能几乎一直存在。
面部两侧偶尔会同时发生偏侧面肌痉挛，但不会同时发生抽搐。
病因
偏侧面肌痉挛大多由血管碰到面神经而引起。也可能由面神经损伤或肿瘤引起。有时无法明确病因。
偏侧面肌痉挛有时由以下原因导致：
风险因素
Some studies show that these factors may increase the risk of hemifacial spasm:
- High blood pressure, also called hypertension.
- Age older than 40.
- Being assigned female at birth.
- Certain genes that give instructions to proteins that help carry cholesterol and other fats through the bloodstream, such as APOE e4.
- Brain lesions or tumors, or conditions such as multiple sclerosis.
- History of facial nerve injury or Bell's palsy.
预防
There is no known way to prevent hemifacial spasm. But managing stress, fatigue and anxiety may help lessen symptoms.