Not long ago, a 13-year-old boy accompanied by his parents came to our clinic with the complaint of “10 days of vision loss in the left eye”. I performed visual field, optical coherence tomography, fundus angiography, and visual evoked potentials, and considered “optic nerve retinitis of the left eye”. The patient liked to play with cats and dogs, and had been scratched by a cat on his right hand 2 weeks before the visit, and had a cold a week before the onset of the disease. This reminded me of a rare disease called “cat scratch disease”. After reviewing the literature, and in the patient’s extremities and trunk, I found that “cat-scratch disease” is a zoonotic disease. The incubation period is usually 10 to 30 days, and in a few cases it can be several months or even 1 or 2 years, usually after being scratched, bitten or in close contact with a dog or cat. The exact mechanism of infection is unclear, and it is presumed that the pathogen invades the broken skin of the body with dog or cat scratches or bites, and then reaches the regional lymph nodes via the lymphatic vessels causing an inflammatory response. The disease is generally benign and self-limiting, but a small number of patients can develop severe systemic damage. Doctors recommend not to have too close contact with cats and dogs to avoid being bitten and scratched by them, especially in the spring when animals are in heat and in the summer when the temperature is high and stifling, to minimize contact with cats and cause unnecessary injuries; people with low immunity are prone to serious consequences, so it is recommended that patients with chronic diseases and those with low immunity should not keep cats. If you have swollen lymph nodes, fever and other symptoms after being bitten and scratched by a cat or dog, you should go to the hospital for examination.