Facial twitching in blinking may be caused by facial muscle spasm, facial nerve palsy and trigeminal neuralgia. 1. Facial muscle spasm: this kind of patients usually manifests as intermittent involuntary clonic twitching or painless tonicity of one side of the facial muscles, when the patient blinks, the patient’s facial nerve is compressed or stimulated, and the symptoms of twitching may appear. 2. Facial nerve palsy: If the patient’s eye blinking is accompanied by symptoms such as crooked mouth and eyes and drooling in addition to twitching on one side of the face, it may be caused by facial nerve palsy. 3. Trigeminal neuralgia: In addition, if the patient suffers from symptoms of trigeminal neuralgia, when the patient blinks, it may compress or stimulate the trigeminal nerve, and then there is a twitching performance on one side of the face when the eye blinks. It is recommended that patients with facial twitching consult a hospital in a timely manner to assess their condition and follow the doctor’s instructions for treatment.