Pertussis is a common respiratory infectious disease. If it is not fully treated and medication is stopped right after the symptoms are alleviated, it is likely to cause repeated relapses and persistent prolongation. Therefore, the treatment of this disease should follow the doctor's advice, choose an adequate amount of antibiotics, and adhere to the prescribed course of treatment. After one course of treatment, a re-examination should be conducted to confirm the absence of the pathogen in the body before discontinuing the medication. Medication should not be stopped merely based on symptom relief, as doing so can easily lead to repeated relapses and prolonged disease, affecting the child’s normal life and, in severe cases, possibly causing delayed growth and development.