Rabies is mainly triggered by the disease-causing virus carried in the saliva of the diseased animal after being bitten by a moving bite. When rabies strikes, it is not like people imagine that the patient will learn to bark like a dog, or even bite people and so on. With the gradual aggravation of the disease, the patient has the nervous system is damaged, there will be a high degree of excitability, sometimes there will be laryngeal spasm, and even hydrophobic symptoms, especially like learning the sound of a dog barking, in fact, not deliberately to blood dog barking, but due to the sound, light, water stimulation of the throat spasm caused by the symptoms, as the patient appears extreme fear, there will be screaming, but are the virus caused by the patient’s mental as well as neurological Symptoms, serious will lead to respiratory failure, and even endanger the life of the patient.