Dry nostrils can be caused by lung heat, but it can also be caused by other factors, such as stomach heat. 1. Chinese medicine believes that the nose is connected to the lungs, and the air from the outside world passes through the nasal cavity when it enters and leaves the lungs. If there is heat in the lungs, and it is not drained, the nostrils will appear dry. At the same time, there will also be a dry cough, dry and sore throat. 2. Stomach heat is generally due to long-term consumption of spicy and stimulating food, or greasy food. Stomach heat goes up to the nostrils, and the patient will also have dry nasal passages. If stomach heat damages the blood channels it also tends to cause nosebleeds. Dry nostrils should be treated by a doctor. If it is caused by lung heat, it can be treated by taking medicines to clear heat and promote the lungs. If it is caused by heat in the stomach, you can use medicines to clear the fire in the stomach to carry on the treatment. But be sure to follow the doctor’s instructions, do not blindly self-medication.