What are the symptoms of a respiratory infection?

The symptoms of respiratory tract infections are diverse, and mainly include: 1. Cough: May be accompanied by sputum production, with varying amounts, colors, and characteristics, reflecting different stages and pathogens of the infection. 2. Fever: Varying in severity; high fever may be accompanied by chills, headache, and general body aches. 3. Nasal congestion and runny nose: Common in upper respiratory tract infections, affecting normal breathing, sometimes accompanied by sneezing. 4. Sore throat: Redness, swelling, and pain in the throat, difficulty swallowing, possibly accompanied by hoarseness. 5. General malaise: Such as fatigue, loss of appetite, headache, and chest pain, varying in severity according to the condition. These symptoms may appear individually or concurrently, with specific manifestations varying among individuals. When symptoms of a respiratory tract infection occur, timely medical attention should be sought to avoid delays in treatment.