14 Frequent Causes of Pleurisy

2. Bronchitis

Bronchitis is inflammation of the bronchial tubes, which carry air to your lungs. When these airways swell, they can irritate the lining around your lungs. This irritation can trigger pleurisy, especially if the infection spreads or causes strong, ongoing coughing. The swelling makes it harder for air to move freely.

You may notice a cough that brings up mucus, chest tightness, or mild shortness of breath. Acute bronchitis often begins after a viral infection such as a cold. Chronic bronchitis develops over time and most often results from long-term exposure to irritants like cigarette smoke or polluted air.

Frequent coughing can strain chest muscles and worsen sharp pain with breathing. Infection or inflammation may spread to the pleura. Common causes include viral infections, long-term smoking, air pollution, dust exposure, and repeated irritation.

3. Lung Infections

Lung infections are one of the most common causes of pleurisy. When you develop an infection in your lungs, the thin lining around them, called the pleura, can become inflamed. This swelling often causes sharp chest pain that gets worse when you take a deep breath or cough.

Viruses that cause the flu or severe colds can spread to the lower airways and lead to pleurisy. Symptoms often improve on their own, though chest discomfort may linger. Bacterial infections like pneumonia can also inflame the pleura and cause fluid buildup in the lungs, leading to fever, chills, cough, and shortness of breath.

Less common infections, including tuberculosis, can inflame the pleura and cause ongoing chest pain, weight loss, and fatigue. Fluid can collect between the lung and chest wall, which leads to pleural effusion and makes breathing more difficult.

4. Smoking

Smoking harms your lungs in many ways. It irritates your airways and the thin lining around your lungs, called the pleura. When this lining becomes inflamed, you may feel sharp chest pain when you breathe in, cough, or move your chest. The irritation can build over time.

Cigarette smoke contains many toxic chemicals that damage lung tissue and weaken your immune defenses. Viral infections are a common cause of pleurisy, and smoking raises your risk of these infections. It also increases your risk of chronic obstructive pulmonary disease and some forms of interstitial lung disease, which can lead to repeated infections or ongoing irritation.

Secondhand smoke can also affect you. Regular exposure may lower lung function, especially in children and teens. If you already have a lung condition, smoking can worsen coughing, shortness of breath, and chest discomfort.

5. Alcohol Consumption

Alcohol use can affect your lungs in indirect but serious ways. It does not usually inflame the pleura on its own, but it can raise your risk of infections that lead to pleurisy. When the pleura becomes irritated, you may feel sharp chest pain while breathing.

Heavy or frequent drinking weakens your immune system. When your body cannot fight germs well, you are more likely to develop lung infections such as pneumonia. These infections can spread inflammation to the lining around your lungs. Alcohol also raises your risk of aspiration, which occurs when food, liquid, or vomit enters your lungs and causes a severe infection.

Long-term alcohol misuse can damage your liver and heart. Heart failure can cause fluid buildup in the chest cavity. Extra fluid in the pleural space can stretch and irritate the pleura, which leads to discomfort and breathing trouble. Reducing alcohol intake can help lower these risks and support lung health.

6. Pollution

You breathe outdoor and indoor air every day, and polluted air can irritate the lining around your lungs. This thin lining, called the pleura, can become inflamed when you inhale harmful particles or gases. That irritation may lead to pleurisy and sharp chest pain when you breathe or cough.

Outdoor air pollution often includes tiny particles, ground-level ozone, smoke, and chemical fumes. These pollutants come from car exhaust, factories, wildfires, and dust. When you inhale them, they can irritate your airways and lung tissue. In some cases, the irritation spreads deeper and affects the pleura.

Indoor pollution also raises risk. Tobacco smoke, mold, and fumes from cleaning products may harm your lungs over time. If you have asthma or another lung disease, polluted air can worsen symptoms and increase inflammation. Limiting exposure to polluted air should be a key step in protecting your lungs and lowering the chance of pleural irritation.

7. Untreated Infections

When you leave an infection untreated, it can spread to the lining around your lungs. This thin lining, called the pleura, can become inflamed. Once that happens, you may feel sharp chest pain when you breathe, cough, or move your chest.

Viral infections are a common cause. A cold or flu can move into your lower airways and irritate the pleura. Most viral infections improve on their own, but inflammation sometimes continues and leads to pleurisy. Bacterial infections such as pneumonia can also spread and cause fluid buildup between the layers of the pleura, which is known as pleural effusion.

Other infections, including tuberculosis, can slowly damage lung tissue and irritate the pleura over time. In rare cases, pus can collect in the pleural space. Treatment often includes antibiotics, and fluid drainage may be necessary in more serious cases.

8. Tuberculosis

Tuberculosis is a bacterial infection that usually affects your lungs. The germs spread through the air when someone with active disease coughs, speaks, or sings. If you breathe in these germs, they can settle in your lungs and begin to multiply. When tuberculosis affects the lung lining, it can cause pleurisy. The inflamed pleura rubs together during breathing, leading to sharp chest pain that worsens with deep breaths or coughing.

Other symptoms may include a persistent cough, fever, night sweats, weight loss, and fluid buildup between the lung and chest wall, causing shortness of breath. Skin or blood tests can help detect infection, and chest imaging may show changes in the lungs or fluid buildup. If fluid is present, a small sample may be removed with a needle for testing.

9. High Blood Pressure

High blood pressure increases the force of blood moving through your vessels. Over time, this extra pressure can strain your heart and lungs. When pressure rises in the blood vessels around your lungs, fluid can leak into the pleural space and affect the lining around your lungs. This fluid buildup is called pleural effusion. It can irritate the pleura and cause sharp chest pain when you breathe in.

You may also feel short of breath or notice a dry cough. Heart failure often connects high blood pressure and pleurisy. When your heart cannot pump effectively, fluid can back up into your lungs and chest. In some cases, swelling in the legs or ankles may also appear due to fluid retention. High blood pressure often has no noticeable symptoms at first. Risk factors include aging, excess weight, high salt intake, inactivity, and smoking.

10. Circulatory Conditions

Problems with your heart and blood vessels can trigger pleurisy. These conditions change how blood flows through your lungs and chest. When blood flow is blocked or backed up, the pleura can become irritated and inflamed. Reduced oxygen delivery to lung tissue may also contribute to chest discomfort and breathing difficulty.

One serious cause is pulmonary embolism. A blood clot blocks an artery in your lung and can cause sudden shortness of breath, sharp chest pain that worsens with breathing, and a fast heartbeat. The blocked flow leads to inflammation of the lining around your lungs.

Heart failure can also cause fluid buildup in the pleural space, which is known as pleural effusion. Certain blood vessel disorders cause swelling in the vessels and nearby tissues, including the pleura. Treatment depends on the cause and may include blood thinners, diuretics, or other medicines.

11. Various Heart Conditions

Certain heart conditions can lead to pleurisy. When your heart does not pump blood well, fluid can build up in your lungs and in the space around them. This fluid irritates the pleura and may cause sharp chest pain when you breathe.

Congestive heart failure is a common cause. In this condition, your heart cannot move blood through your body as it should. Fluid collects in the pleural space and leads to pleural effusion, which places pressure on your lungs. Inflammation around the heart, such as pericarditis, can also spread to nearby tissues because the heart and lungs sit close together in your chest.

Blocked heart arteries, known as coronary artery disease, may weaken your heart over time and increase pressure in your chest. Treatment often includes medicines such as diuretics to remove extra fluid and other drugs that support heart function.

12. Drowning

Drowning can irritate your lungs and lead to pleurisy. When you inhale water, it can inflame the lining around your lungs, called the pleura. This irritation may cause sharp chest pain that worsens when you take a deep breath or cough.

Water in your lungs disrupts normal breathing and causes swelling and fluid buildup. This response can spread to the pleura and trigger inflammation. Lung injury may last for days or weeks after the event. You may notice chest pain, shortness of breath, cough, or fever. Fluid can collect between the layers of the pleura, which is known as pleural effusion.

Children between ages 1 and 4 and older adults have higher drowning risks, but inhaling water can affect anyone. Seek emergency medical evaluation immediately after any drowning event. Oxygen may be given, excess fluid may be removed, and breathing may be closely monitored.

13. Emphysema

Emphysema is a long-term lung disease that damages the tiny air sacs in your lungs. These air sacs move oxygen into your blood. When they break down, your lungs lose their stretch and trap air inside. This trapped air can press against the pleura and cause irritation.

As pressure increases, sharp chest pain may occur with deep breaths or coughing. Smoking is the leading cause, while long-term exposure to air pollution or chemical fumes also raises risk. Symptoms can include shortness of breath, wheezing, frequent chest infections, chest tightness, persistent cough, fatigue, and weight loss in severe cases.

In advanced emphysema, trapped air increases the risk of a collapsed lung. Air can enter the pleural space and trigger sudden pleurisy pain. Treatment focuses on easing symptoms and slowing lung damage with therapies such as bronchodilators, inhaled corticosteroids, or oxygen therapy may be used. Pulmonary rehabilitation and smoking cessation help protect your lungs and reduce strain on the pleura.

14. Blood Clots

Blood clots can cause pleurisy when they block blood flow in your lungs. This condition is called pulmonary embolism. It often begins as a clot in a deep vein in your leg, known as deep vein thrombosis, that travels through your bloodstream to your lungs.

When a clot blocks a lung artery, it irritates and inflames nearby tissue. This inflammation can spread to the pleura, the thin lining around your lungs. You may feel sharp chest pain that worsens with deep breathing, coughing, or movement. Other symptoms can appear suddenly, including shortness of breath, fast breathing, coughing, coughing up blood, `lightheadedness, or a rapid heartbeat.

Risk factors include prolonged sitting, recent surgery, smoking, pregnancy, cancer, prior blood clots, and inherited clotting disorders. Seek emergency care if pulmonary embolism is suspected. Imaging tests to confirm the diagnosis and typically treat it with blood thinners. Severe cases may require clot-dissolving medications or specialized procedures.