Causes of dizziness 1 month after facial muscle spasm surgery include nerve edema, vestibular nerve ischemia, and sleep deprivation. 1. Nerve edema: As the facial nerve and the auditory nerve are located close to each other, the surgery may cause nerve edema, which may lead to dizziness. 2. Vestibular nerve ischemia: After surgery for facial muscle spasm, the inner ear artery supplied by the vestibular nerve may become ischemic, resulting in dizziness and vertigo. 3. Lack of sleep: After facial muscle spasm surgery, if there is lack of sleep due to tension and anxiety, the brain does not have sufficient rest, and dizziness may occur when waking up in the morning. When persistent dizziness occurs after facial muscle spasm surgery, you should go to the Neurology Department of the hospital in time to clarify the cause and choose the appropriate treatment plan according to the patient’s condition.