Myogenous temporomandibular disorder(M-TMD)is one of the main subtypes of temporomandibular dis-order(TMD)and typically manifests as masticatory myofascial pain;the incidence of TMD has been increasing annually in recent years.Botulinum toxin type A(BTX-A)is a potent neurotoxin produced by Clostridium botulinum.BTX-A in-hibits the release of acetylcholine from the presynaptic membrane,thereby blocking neuromuscular junction signaling.The noncosmetic application of BTX-A in the oral and maxillofacial regions is a prominent research topic.In recent years,an increasing number of studies have focused on the application of BTX-A in the treatment of M-TMD.The re-sults of a literature review revealed that an appropriate dose(10-50 U unilaterally)of BTX-A administered in a single in-jection into the masticatory muscles can effectively treat myalgia over a period of 3-6 months.Common adverse effects,such as masticatory weakness and facial paralysis,are transient and can be avoided by standardized injection tech-niques.However,there is a lack of standardized guidelines for injection techniques in clinical practice.