The duration of antibiotic use is related to the type of disease, the severity of the condition and the type of antibiotic used, and cannot be generalized. Antibiotics mainly have an anti-inflammatory and antiseptic effect, and different antibiotics can target different germs. For different germ infections, the time of antibiotics use also varies, the time of use is shorter for patients with mild condition, some patients can use 1-3 days; patients with serious condition, or even complications, may have to use antibiotics for a long time. However, long-term use of antibiotics can lead to a decrease in the body’s immunity, which can cause dysbiosis of the body’s flora and trigger secondary infections. Therefore, when treating the disease, doctors need to weigh the pros and cons and choose an appropriate treatment plan. The proper use of antibiotics is a powerful tool for treating diseases, but the abuse of antibiotics is harmful to the organism, so it is important to take antibiotics as prescribed by the doctor and avoid long-term use.