Twitching on the right side of the face may be related to mental tension, facial muscle spasm, epilepsy and so on. 1. Mental tension: some people encounter some stressful events, resulting in mental tension, resulting in increased sympathetic excitability, it may show the symptoms of involuntary twitching on one side of the face, and the symptoms can be relieved after the mood is calm. 2. Facial muscle spasm: this disease may be caused by mechanical stimulation, facial nerve compression or poor recovery from facial nerve paralysis, etc. In the early stage of the disease, it mainly manifests as eyelid fluttering, and gradually expands to the corners of the mouth as well as the entire facial muscles, so there may be a side of the face twitching symptoms, especially in the event of excessive mental tension, fatigue, etc., the symptoms are obviously aggravated. 3. Epilepsy: epileptic focal seizures may also originate from the right side of the face convulsions, and then the limbs begin to twitch, severe cases may appear foaming at the mouth, unconsciousness. The causes of right-sided facial convulsions are more, patients should consult the doctor in time for early diagnosis and treatment, so as not to delay the condition and affect the prognosis.