Who should avoid flying?

Airplanes are an ideal mode of transportation today, and with the improvement of people's living standards, more people are flying for business, tourism, visiting relatives, and friends. However, medical research suggests that the following people should avoid flying: 

1. Patients with infectious diseases, such as infectious hepatitis, active pulmonary tuberculosis, typhoid, and other communicable diseases, should not fly during the national isolation period. Patients with chickenpox should not fly until the affected areas have healed. 

2. Patients with mental illnesses, such as epilepsy and other mental illnesses, should not fly as the aviation atmosphere can easily induce acute episodes of the disease. 

3. Patients with cardiovascular diseases, as mild hypoxia in the air may cause a recurrence or worsening of the condition, especially for those with heart failure, myocardial ischemia, myocardial infarction, and severe hypertension, who are generally advised against flying. 

4. Patients with cerebrovascular diseases, such as cerebral embolism, cerebral hemorrhage, and brain tumors, may experience worsening of their condition due to the noise, vibration, and hypoxia during takeoff and landing, and are prohibited from flying. 

5. Patients with respiratory system diseases, such as emphysema and cor pulmonale, may not adapt well to the environment, and if they have pneumothorax or bullae, the condition may worsen due to gas expansion during the flight. 

6. Patients who have undergone gastrointestinal surgery should not fly within ten days of the operation. Patients with gastrointestinal bleeding should only fly three weeks after the bleeding has stopped. 

7. Patients with severe anemia, with hemoglobin levels below 50 grams/liter, should not fly. 

8. Patients with ear and nose diseases, such as acute exudative inflammation of the ear and nose, and those who have recently undergone middle ear surgery, should not travel by air. 

9. Pregnant women nearing their due date, due to changes in air pressure, may give birth prematurely, especially those in the 35th week of pregnancy or later, should avoid flying.