Summer is an ideal time for rest, recreation, and outdoor activities. However, many people are also prone to respiratory illnesses during this time. Doctor Nguyen Van Ngan, from the Respiratory Department of Tam Anh General Hospital in Hanoi, explains some common causes.

Sudden temperature changes: When coming in from the hot outdoors, taking a shower immediately or setting the air conditioner to a very low temperature creates a large temperature difference between the body and the surrounding environment. This can cause heat shock, reducing the resistance of the respiratory system and creating opportunities for bacteria and viruses to enter the body. Sudden temperature changes can cause illnesses such as pharyngitis, sinusitis, and bronchitis.

Air pollution and dust: High temperatures, vehicle exhaust, and dust from traffic create a favorable environment for harmful agents like bacteria, viruses, and fine dust particles to enter the body. These pollutants irritate the respiratory tract, causing bronchial spasms, obstructing airways, and increasing the risk of infections like pneumonia, allergic rhinitis, or asthma.

Improper use of air conditioning can easily cause respiratory illnesses. Image generated by AI.

Unhealthy lifestyle: Drinking alcohol to cool down in the summer can weaken the body's resistance. After drinking alcohol, the body often feels hot. Using strong fans, air conditioning, or taking a cold shower at this time increases the risk of respiratory illnesses, especially bronchitis and pneumonia. Consuming alcoholic beverages also dehydrates the body quickly, weakening the immune system and creating conditions for bacteria to thrive.

Exposure to crowds while traveling: Summer is a time when many families travel. Contact with large groups of people at tourist destinations and on public transport also carries the risk of contracting infectious diseases and respiratory illnesses like the flu, pharyngitis, bronchitis, or pneumonia. Doctor Ngan recommends that travelers strengthen their immune systems to prevent illness by eating a nutritious diet and maintaining good personal hygiene.

Dehydration: In the summer, high temperatures make the body prone to dehydration through sweating. This causes phlegm in the lungs to dry and thicken, making it difficult to expectorate, especially for people with chronic obstructive pulmonary disease (COPD) and asthma, promoting respiratory tract infections. Dehydration also reduces the body's ability to fight off pathogens, making it more susceptible to illness.

Khue Lam