Respiratory infections are common situations in both clinical and daily life. The focus of treating respiratory infections is to identify the cause. For example, upper respiratory infections are most commonly caused by viral infections, primarily presenting symptoms such as coughing, sputum production, nasal congestion, runny nose, and sore throat, and may be accompanied by fever. The treatment can involve taking antiviral medications and nonsteroidal anti-inflammatory drugs to reduce fever when it occurs. For lower respiratory infections, such as lung infections, these are often due to bacterial infections. Identifying the type of bacteria through blood or sputum cultures can allow for targeted antibiotic treatment. It is important to avoid catching colds, exercise regularly, and improve overall fitness to prevent respiratory infections.