What pneumonia feels like

Pneumonia usually starts like a cold or flu, then gets worse over several days. You may have a cough that produces mucus (phlegm), chest pain when you breathe or cough, shortness of breath, fever, chills, or fatigue. Some people feel confused or disoriented, especially older adults. The symptoms depend partly on what caused the pneumonia — a virus, bacteria, or fungus — and how severe it is.

The key difference between pneumonia and a regular cold is that pneumonia affects your lungs' air sacs, where oxygen enters your bloodstream. When those sacs fill with fluid or pus, your body struggles to get enough oxygen. That is why shortness of breath and chest pain are common warning signs that something more serious than a cold is happening.

Key Takeaways

  • A cough that produces mucus, chest pain when breathing, and shortness of breath are the most common signs that you may have pneumonia rather than a cold.
  • Fever, chills, and fatigue that last more than a few days, or that get worse after seeming to improve, suggest you should see a doctor.
  • Older adults, young children, and people with weakened immune systems may have fewer or less obvious symptoms even with serious pneumonia.
  • A doctor diagnoses pneumonia with a physical exam, listening to your lungs, and usually a chest X-ray or blood test.
  • Seek immediate care if you have severe shortness of breath, chest pain, confusion, or bluish lips or fingernails.

Symptoms that point to pneumonia

A productive cough — one that brings up mucus or phlegm — is the most common sign. The mucus may be clear, white, yellowish, or even tinged with blood. A dry cough alone is less typical of pneumonia, though it can happen early on.

Chest pain that gets worse when you breathe deeply or cough is another strong indicator. You may feel a sharp or stabbing sensation, or a dull ache. This happens because the infection inflames the lining around your lungs.

Shortness of breath — feeling like you cannot catch your breath even at rest, or becoming winded more easily than usual — means your lungs are not moving oxygen into your blood efficiently. This is one of the most important warning signs.

Fever and chills often accompany pneumonia, though not always. Your temperature may be high (above 100.4°F or 38°C) or only slightly elevated. Chills, sweating, and feeling very cold are your body's response to infection.

When symptoms suggest you need to see a doctor

See a doctor if you have a cough lasting more than a week, especially if it produces mucus. Go sooner if you also have chest pain, shortness of breath, or a fever that lasts more than a few days. If you felt better for a day or two and then got worse again — a pattern called a "biphasic illness" — that is also worth checking out.

Seek immediate care (call 911 or go to an emergency room) if you have severe shortness of breath, chest pain that feels crushing or severe, confusion or difficulty staying alert, or bluish lips or fingernails. These signs mean your body is not getting enough oxygen and you need urgent help.

Certain groups need to be especially cautious. Older adults, very young children, pregnant people, and anyone with a weakened immune system (from HIV, chemotherapy, or certain medications) may have milder or atypical symptoms even with serious pneumonia. If you are in one of these groups and have any respiratory symptoms lasting more than a few days, contact your doctor.

How doctors identify pneumonia

Your doctor will start with a physical exam and ask about your symptoms. They will listen to your lungs with a stethoscope — pneumonia often produces abnormal sounds like crackling or wheezing.

A chest X-ray is the standard way to confirm pneumonia. It shows areas of your lungs filled with fluid or pus, which appear as white or cloudy patches on the image. Some doctors may order a CT scan if the X-ray is unclear or if pneumonia is severe.

Blood tests can help identify what caused the pneumonia — bacteria, virus, or fungus — which guides treatment. Your doctor may also test a sample of mucus from your cough to identify the specific germ responsible.

Pulse oximetry — a small clip on your finger that measures oxygen in your blood — is often done during the visit. A reading below 95% suggests your lungs are not working well enough.

Pneumonia in different age groups

Young children with pneumonia may have rapid or labored breathing, retractions (skin pulling in around the ribs when they breathe), or refusal to eat or drink. Fever may be the only obvious sign in infants. Parents should watch for these signs and contact a pediatrician promptly.

Older adults often have fewer obvious symptoms. They may not run a high fever, or may seem confused or unusually tired without a prominent cough. Because of this, pneumonia in elderly people is sometimes diagnosed later, when it is more serious. Family members should take any respiratory symptoms seriously in older relatives.

People with chronic lung disease (asthma, COPD) or heart disease may develop pneumonia more easily and experience worse symptoms. They should contact their doctor at the first sign of a respiratory infection.

What happens after diagnosis

If your doctor confirms pneumonia, treatment depends on the cause. Bacterial pneumonia is treated with antibiotics. Viral pneumonia usually improves on its own, though your doctor may recommend supportive care like rest, fluids, and over-the-counter fever reducers. Fungal pneumonia requires antifungal medication and is less common.

Most people recover at home with outpatient care. Your doctor will tell you when to expect improvement — usually within a few days of starting antibiotics for bacterial pneumonia, though a cough may linger for weeks. You will likely be asked to follow up in one to four weeks so your doctor can confirm the infection has cleared.

Hospitalization is needed if you have severe pneumonia, very low oxygen levels, confusion, or other serious signs. Older adults and people with other health conditions are more likely to need hospital care.

Frequently Asked Questions

Can you have pneumonia without a fever?

Yes. Some people, especially older adults and those with weakened immune systems, develop pneumonia without running a fever. A persistent cough, shortness of breath, and chest pain can occur even with a normal body temperature. If you have these symptoms, see a doctor regardless of whether you have a fever.

Is pneumonia contagious?

Pneumonia itself is not contagious, but the germs that cause it are. Bacterial and viral pneumonia spread through respiratory droplets when someone coughs or sneezes. You can reduce spread by covering your cough, washing your hands, and staying home while sick.

How long does pneumonia last?

Bacterial pneumonia usually improves within a few days of starting antibiotics, though you may feel tired for weeks. Viral pneumonia typically clears in one to three weeks. A cough often persists for four to eight weeks even after the infection is gone. Recovery time varies based on age, overall health, and how severe the pneumonia was.

Can you get pneumonia more than once?

Yes. Having pneumonia once does not make you immune. You can catch pneumonia again from a different germ. People with chronic lung disease, smokers, and older adults are at higher risk for recurrent pneumonia. Vaccines can reduce the risk of certain types of bacterial pneumonia.

What is the difference between pneumonia and bronchitis?

Bronchitis inflames the airways that carry air to your lungs, while pneumonia infects the air sacs in your lungs themselves. Bronchitis usually produces a cough but not the shortness of breath or chest pain typical of pneumonia. A chest X-ray can distinguish between the two.