Symptom 1: There are some precursors before the onset of facial paralysis. Many times, we generally feel unwell, which will lead to some anxiety, depression and pessimism. In addition, people's irregular life will make people's normal work and life impossible, which will lead to the decline of the body's disease resistance and low immunity.

Symptom 2: If the muscles of the affected side are completely paralyzed, the forehead wrinkles disappear, the eye fissure expands, the nasolabial groove is flat, and the corners of the mouth droop. When the teeth are exposed, the mouth leans to the healthy side. The affected side should not frown, close eyes, inflate or pout.

Symptom 3: When you drum your cheeks and whistle, you will leak air because the affected lips cannot be closed. When eating, food residues often stay in the gap between the teeth and cheeks of the affected side, and saliva often drips from this side. Because the tear spot turns inward with the lower eyelid, tears can't flow out according to normal drainage.