Respiratory infections are among the most common health problems affecting people of all ages. They occur when viruses, bacteria, or other microorganisms invade the respiratory tract, which includes the nose, throat, airways, and lungs. These infections can be categorized as upper respiratory infections (like the common cold, sinusitis, and pharyngitis) or lower respiratory infections (such as bronchitis, pneumonia, and tuberculosis).

Common symptoms include cough, sore throat, nasal congestion, fever, fatigue, shortness of breath, and chest discomfort. While mild infections often resolve on their own, more severe cases—especially in children, the elderly, and individuals with weakened immune systems—may require medical attention.

Treatment depends on the cause and severity of the infection. Viral infections usually improve with rest, fluids, and supportive care, while bacterial infections may need antibiotics. Preventive measures such as good hygiene, vaccinations, avoiding smoking, and maintaining a healthy immune system can significantly reduce the risk of respiratory infections.

Understanding the symptoms and seeking timely medical advice can help manage respiratory infections effectively and prevent complications.