Certain conditions, such as Bell's palsy and certain types of tumors can paralyze facial nerves and muscles.

某些情况，如贝尔氏麻痹和某些类型的肿瘤，会使面部神经和肌肉瘫痪。

The main symptoms of a Bell's palsy can be seen by looking at a person's face.

在患者面部可以观察到贝尔麻痹的主要症状。

Now, it's important to distinguish Bell's palsy from other causes of facial palsy like a stroke.

鉴别贝尔麻痹和其他病因（如中风）导致的面部瘫痪很重要。

They even have some result in simulating the effect of Bell's palsy, which is the paralysis of facial muscles on one side.

在面肌麻痹的方面，他们甚至模拟了贝尔麻痹的一些效果。

Treatment isn't needed in all cases of Bell's palsy, but in some severe cases, corticosteroids can help reduce the nerve inflammation and speed up the recovery.

并不是所有贝尔麻痹患者都需要治疗，但对于一些严重病例，皮质类固醇激素可以减轻炎症加速愈合。

It is “considered a form of facial paralysis” brought on by a variety of factors, including “Bell’s palsy, infection, stroke, surgery, and trauma.”

它“被认为是面瘫的一种形式” ，由多种因素引起，包括“贝尔氏麻痹、感染、中风、手术和外伤” 。

The underlying cause of cranial nerve damage is idiopathic which means it's unknown, so when there's facial nerve a paralysis from a known cause like a stroke, a tumor, or trauma, it's not considered a Bell's palsy.

该颅神经受损是特发性的，即原因不明，所以有明确病因（如中风、肿瘤、外伤）的面神经麻痹不属于贝尔麻痹。