Sudden swelling of the eyes when blowing the nose may be due to subcutaneous emphysema, orbital emphysema, but it cannot be ruled out due to rhinitis and other diseases, and the patient needs to seek medical treatment and take targeted measures. 1. Subcutaneous emphysema: When blowing the nose, too much force may lead to subcutaneous emphysema, resulting in the phenomenon of sudden swelling of the eyes when blowing the nose. Usually, the symptoms are mild and do not require special treatment, and will gradually recover in about 3 to 5 days. 2. Orbital emphysema: If you blow your nose too hard, it may cause damage to the normal tissue structure, and the gas enters the eye socket through the nasal cavity, resulting in a sudden swelling of the eye. If there is no change in vision, you can observe it first. If there is any abnormal vision, it is recommended to go to the hospital for examination in time to avoid delaying the condition. 3. Rhinitis: If the patient himself suffers from rhinitis, excessive force in the process of blowing the nose may lead to retrograde infection of inflammation, resulting in the phenomenon of eye swelling. In addition to actively treating the primary nasal disease, you should also seek medical attention for the eye condition. Once a patient has a sudden swelling of the eyes after blowing the nose, it may also be related to other diseases, and it is not possible to determine the specific cause based on one symptom alone, so it is recommended to go to the hospital for examination in a timely manner and make judgment based on the clinical symptoms under the guidance of the doctor.