Antalgia is mainly caused by tetanus infection in general surgery. The principle of coracobrachialis is due to the simultaneous contraction of the dorsal and abdominal muscles, as the back muscles are more powerful trunk because of the twisting into an arch combined with the neck, the bent knees, bent elbows, half-clenched fists and other spastic postures of the limbs thus forming the phenomenon of coracobrachialis. In addition, the typical tetanus manifestations, there are also on the basis of the whole body muscle tension contraction, such as muscle tonic stiffness, appear paroxysmal strong spasms. The first muscle to be affected is the masticatory muscle, followed by the expression muscles of the face, neck, back, abdomen, limb muscles, and finally the corresponding symptoms of the diaphragm, generally in that order. The corresponding clinical manifestations are difficulty in opening the mouth, frowning, downward corner of the mouth, grinning bitterly, neck tonicity, and head tilting back. Corneal inversion is one of the typical clinical manifestations. For tetanus infection, first of all, attention should be paid to prevention, and foreign bodies and infections should be removed promptly, and tetanus antitoxin or immunoglobulin should be applied. Once detected, emergency treatment such as sedation, removal and application of tetanus immunoglobulin or antitoxin is required.