What tests should be done to confirm the diagnosis of facial muscle spasm? EEG and EMG are routinely performed. If necessary, mammography and cranial X-ray, cranial CT and MRI should also be performed to exclude mammographic and cranial disorders. To avoid misdiagnosis, it should be clinically differentiated from the following diseases: 1. Facial muscle twitching after facial palsy Previously, there was a clear history of facial palsy, due to incomplete recovery of facial palsy caused by axonal regeneration disorder, and the affected side is left with varying degrees of facial muscle weakness and paralysis. 2, Idiopathic blepharospasm Bilateral blepharospasm, often accompanied by mental disorder, electromyography shows facial muscle asynchronous discharge with normal frequency, probably due to dysfunction of the cone system. 3. Facioscapulohumeral twitching is a subtle tremor of individual muscle bundles of the facial muscles, often invading the surrounding eyelid muscles, mostly limited to one side, and may resolve on its own, probably due to benign lesions invading the brainstem and cranial nerves. 4, habitual spasms are small spasms, aimless stereotyped or repeated jumping of facial muscles, mostly seen on one side, mostly onset in childhood. 5, hand-foot tics and chorea caused by lesions of the midbrain and pyramidal system.