Botulinum toxin is widely used in the clinic, and can effectively treat facial muscle spasm, eyelid spasm and other dystonia, and can also be used in the treatment of a variety of diseases, as follows: 1, post-herpetic neuralgia: post-herpetic neuralgia in the elderly is more obvious, oral medication is less effective, local injection of botulinum toxin can significantly relieve pain; 2, trigeminal neuralgia, migraine and other neuralgia; 3, axillary odor; 4, facial acne; 5, hand and foot hyperhidrosis; 6, hair loss.