The nasal cavity located on the lower side often becomes more obstructed when lying on the side. After transferring to the other side, the nasal cavity that was not congested or was less congested on the upper side, became congested or more congested after transferring to the lower side. The nasal cavity that was located on the lower side just now has less nasal congestion. In addition, the sense of smell may be diminished to different degrees, and the speech is occlusive nasal sound. Due to the long-term flow of nasal mucus through the nasal vestibule and the upper lip, it can cause dermatitis or eczema, mostly seen in children. The nasal mucus may flow backward into the pharyngeal cavity, and symptoms such as cough and phlegm may appear. This is one of the clinical symptoms of patients with chronic simple rhinitis. Patients with nasal congestion located on the lower side of the nasal cavity when lying on their sides should eat more fresh vegetables and fruits in their diet to replenish sufficient vitamins, eat more food rich in high-quality protein to enhance body resistance, and eat more light and easily digestible liquid diet. Avoid spicy, stimulating food, greasy, fried food; avoid too salty, cold diet, avoid smoking and alcohol. The following foods are recommended to eat less or not: 1, greasy, fried food. Not conducive to recovery and treatment of disease. 2, pickled radish strips too salty pickles, the throat and nasal cavity is not conducive to disease recovery. 3.Ice cream Raw and cold diet. Not conducive to disease.