Knowing the signs of pneumonia can help people recognize when respiratory symptoms may require medical evaluation. Pneumonia is an infection or inflammation affecting the lungs, and it can have different causes, including bacteria, viruses, and other organisms.

Common signs may include cough, fever, chills, fatigue, shortness of breath, and chest discomfort. Some people produce mucus when coughing, although symptoms can vary considerably. Older adults and people with certain medical conditions may sometimes have less typical symptoms.

One of the important signs of pneumonia is difficulty breathing. Breathing may become faster or more uncomfortable than usual. Chest pain can occur, particularly when taking a deep breath or coughing.

Symptoms can range from mild to severe. A person who develops significant difficulty breathing, bluish or grayish lips or skin, confusion, severe weakness, or rapidly worsening symptoms needs urgent medical attention.

Diagnosis generally requires professional assessment. A healthcare provider may listen to the lungs, measure oxygen levels, review symptoms, and decide whether additional testing such as chest imaging or laboratory tests is appropriate.

Treatment depends on the underlying cause. Bacterial pneumonia may require antibiotics, while antibiotics do not treat viral infections. Supportive care may include rest, hydration, and medications recommended by a healthcare professional.

People should not rely only on online symptom lists to determine whether they have pneumonia. Several respiratory conditions can produce similar symptoms, including influenza, COVID-19, bronchitis, and other illnesses.

Risk can be higher for older adults, young children, people with certain chronic conditions, and individuals with weakened immune systems. Preventive measures can include recommended vaccinations, hand hygiene, avoiding tobacco smoke, and staying home when sick when appropriate.

Understanding the signs of pneumonia is useful, but symptoms alone cannot establish a diagnosis. Persistent or worsening respiratory symptoms should be evaluated by an appropriate healthcare professional.