Rabies patients are afraid of water and light because the rabies virus has neurotoxicity, when the virus violates the nervous system, the threshold of nerve excitation will be lowered, and light, water sound, etc. will stimulate its onset. Rabies is a disease caused by the infection of the rabies virus, which is a virulent infectious disease with a very high mortality rate. After infection with the rabies virus and the onset of the disease, the body may experience clinical symptoms such as excitement, anxiety, confusion, difficulty in swallowing (pharyngeal muscle spasm), and hallucinations. Since the rabies virus mainly invades the nervous system of the patient, it will reduce the excitability of the nervous system of the infected person, and then slight stimulation from the outside will lead to nerve excitation, which will then aggravate the symptoms of rabies, and thus the rabies patient will appear to be afraid of water and light and other characteristics.