Nasal dryness and congestion may be caused by dry air, nutritional imbalance, nasal deformity, etc. Frequent mouth ulcers may be caused by heredity, mental stress and nutritional imbalance. 1. Nasal dryness and congestion may be caused by dry air, nutritional imbalance and nasal deformities. Nasal dryness and congestion is more common in spring and fall. Nutritional imbalance, nasal septum deviation and other nasal deformities are also likely to cause nasal dryness and congestion. 2. Frequent mouth ulcers may be caused by heredity, mental stress and nutritional imbalance. Mouth ulcers have a family genetic tendency. Mental stress and dietary imbalance can cause mouth ulcers. Nasal dryness and congestion often long mouth ulcers may also have other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.