When bacteria and viruses enter the body during a cold, the nasal mucosa, the body’s first line of immune defense, increases the permeability of capillaries on the nasal mucosa, releasing a large amount of non-cellular components, forming mucus, blocking the nasal cavity and causing nasal congestion. After the symptoms of nasal congestion appear in general cold, patients should pay attention to keep warm. For mild cold and nasal congestion, you can also use the ginger ventilation method. There are two methods of ginger ventilation: First: cut clean ginger into thin strips and stuff it into the nostrils when you sleep or have a stuffy nose during the day, and take it out after 2-3 hours to relieve nasal congestion. Second: Make ginger soup and take it daily. This method is suitable for patients of all ages, especially for infants below one week old. In addition, ginger can be added to the foot soak to speed up blood circulation and enhance the immunity of the body, which not only relieves the cold, but also effectively fades away the fatigue of the day. If the above methods are still useless after self-treatment, you can take chlorpheniramine or promethazine tablets orally (note that promethazine tablets should not be taken in large quantities for a long time), and the specific dosage of the drug should be selected under the guidance of a professional doctor according to the results of liver and kidney function tests. In addition, when sleeping, patients with nasal congestion should preferably adopt a side-lying position to avoid inflammation caused by nasal secretions flowing into the middle ear. Patients with nasal congestion should not use nasal drops as much as possible. Although this drug can temporarily relieve the symptoms of nasal congestion, it is quite irritating to the nasal mucosa and will induce an immune response in the nasal mucosa, aggravating nasal congestion.