Pneumonia is arguably the most common disease in respiratory medicine, and what we think of as pneumonia is the inflammation of the lungs caused by bacterial or viral infections. Common manifestations: The disease has a rapid onset and is often triggered by rain, cold, exertion, etc. About 1/3 of patients have a history of “cold”. Common manifestations are: ① chills, high fever: the typical symptoms are sudden chills, high fever, body temperature up to 39 ℃ ~ 40 ℃, accompanied by headache, generalized muscle weakness, loss of appetite. Older and frailer people have only low fever or no fever. ②Cough and sputum: Early on, there may be simple cough without sputum or a small amount of white sputum, with the aggravation of infection, sputum appears, and yellow thick sputum is more common. ③ Chest pain: When the lesion involves the chest wall, there is often severe pinprick-like chest pain, which worsens with coughing or deep breathing. ④Difficulty in breathing: When the pneumonia is widespread, inspiration, labored breathing and chest tightness may occur, which often indicates a more serious condition and requires prompt medical attention. Required tests: When the above symptoms appear, go to the local hospital for blood tests, chest CT, etc. Especially if you have repeated symptoms such as fever and cough and are treated as “cold” at the local clinic without significant improvement, you should go to the local hospital for these tests in a timely manner. Treatment and prevention: In addition to bed rest, drinking plenty of fluids and actively draining sputum, the most important aspect of pneumonia treatment is anti-infection, which is commonly known as anti-inflammation. For pneumonia caused by common bacterial infections, the course of antibacterial drugs should be at least 5 days, with most patients requiring 7 to 10 days or longer. For special types of pneumonia such as fungal pneumonia, H7N9 infection, severe pneumonia, etc., special drugs and treatment modalities are needed for further treatment. Strengthening physical exercise, enhancing physical fitness, reducing risk factors such as smoking and alcohol abuse, and improving one’s immunity are effective ways to prevent pneumonia. When recurrent cough and fever occur, you should go to the local hospital in time to avoid delaying the disease and causing serious consequences.