Swelling of one side of the nose may be caused by external injury, nasal vestibular folliculitis, nasal vestibular cysts and other factors. It is recommended to pay attention to local care, reduce the intake of stimulating food, and if necessary, through surgical treatment. 1. External injury: the skin of the nose is broken by external force, which may cause swelling and pain on one side. It is recommended to take good care of the local area and avoid getting wet to induce infection. Within 24 hours of the injury, local ice packs can relieve the pain, and after 24 hours, local compresses can promote blood circulation and reduce swelling. 2. Nasal vestibular folliculitis: Usually do not pay attention to diet, often intake of chili, barbecue, hot pot and other spicy and stimulating ingredients, resulting in inflammation of the hair follicles on the side of the nose, resulting in swelling. It is recommended to eat a light diet, reduce the intake of stimulating foods, and give erythromycin and fusidic acid ointment topical application, which can promote the inflammation to subside. 3. Nasal vestibular cysts: Nasal vestibular cysts can also lead to swelling on one side, accompanied by hardness and pain when infected. It is recommended to consult the ear, nose and throat department of the hospital in a timely manner, and if necessary, to treat it through surgery. Swelling on one side of the nose, it is recommended to pay attention to, it is recommended to carry out timely examination, to clarify the cause, for the cause of the treatment.