A 22-year-old man sneezed hard and immediately felt sharp pain on the left side of his chest, followed by breathlessness that kept getting worse. In the emergency department, he was breathing 24 times a minute, and his blood oxygen level was 80% on room air. A chest X-ray showed a massive left-sided pneumothorax: air had leaked into the space around his lung, and the lung had nearly completely collapsed.
The case, published in March in Cureus, includes a detail that shows how quietly the problem can build. The man had no known illnesses, and a routine pre-employment chest X-ray taken a year earlier had shown nothing abnormal.
Unlike widely shared stories about people injured while holding in a sneeze, this sneeze was not stifled. The report describes it as vigorous.
The Body Type Doctors Recognize
On paper, the patient matched a profile emergency physicians know well. He stood 188 centimeters, about 6 feet 2 inches, and weighed 75 kilograms, about 165 pounds, giving him a body mass index of 21.2. The report describes his build as asthenic, a clinical term for a tall, slender frame. He had also smoked for 8 pack-years, the equivalent of a pack a day for eight years.
That combination is the classic setup for primary spontaneous pneumothorax, a lung collapse in someone without known lung disease. The authors note that it typically affects young, tall, slender men and is often tied to the rupture of subpleural blebs, small air-filled blisters on the surface of the lung.
The physical exam matched the X-ray. Doctors heard no breath sounds over the left side of his chest, and tapping on it produced the hollow, drum-like sound typical of trapped air. His blood pressure stayed stable.
Because the collapse was massive, doctors performed an emergency tube thoracostomy, placing a chest tube between the ribs to let the trapped air escape. His lung re-expanded immediately, and his symptoms eased.
When Pressure Becomes the Trigger
Most spontaneous lung collapses happen while people are at rest. But the authors explain that sudden changes in pressure inside the chest can act as triggers. They urge clinicians to consider a collapsed lung when acute chest pain follows an ordinary physical maneuver like sneezing, especially in patients with a high-risk build.
The report stops short of proving that the sneeze caused the collapse. It shows that symptoms began immediately afterward, which makes the sneeze a plausible trigger rather than a confirmed one.
He is not the only young man whose lung gave way during an everyday burst of effort. A 2025 report, also in Cureus, described a slender 20-year-old nonsmoker whose left lung collapsed while he was blowing out birthday candles.
Treatment depends on the size of the collapse and how stable the patient is. According to MedlinePlus from the National Library of Medicine, a small pneumothorax may go away on its own, doctors may use a needle to let air escape, and a large one is treated with a chest tube. Surgery may be needed to repair the leak or prevent future episodes.
Smoking Is the Risk People Can Change
Height and body shape cannot be changed. Smoking can. A 1987 Swedish study in the journal Chest found that smoking raised the relative risk of a first spontaneous pneumothorax about ninefold in women and 22-fold in men, with risk climbing the more people smoked. In the Stockholm-area population the team studied, first episodes occurred each year in about 18 of every 100,000 men and 6 of every 100,000 women. The researchers roughly estimated the lifetime risk at 12% for men who smoked heavily throughout their lives, compared with 1 in 1,000 among never smokers.
A 2022 case report in the American Journal of Medicine adds that quitting has been shown to lower the risk of a repeat collapse by as much as 40%. Its authors urged clinicians to offer smoking cessation counseling to every smoker who comes in with a first episode. Not every study agrees on how much smoking affects recurrence, but quitting remains the one risk factor patients can control.
That matters because a first episode is not always the last. MedlinePlus lists continuing to smoke and being tall and thin among the factors that make another spontaneous collapse more likely.
Symptoms That Should Not Be Brushed Off
A collapsed lung after a sneeze remains uncommon, and the vast majority of sneezes, forceful or not, cause no harm. This is also a single case report, which cannot show how often sneezing sets off a collapse.
Still, the symptoms are worth knowing. MedlinePlus lists sharp chest or shoulder pain that worsens with a deep breath or cough, along with shortness of breath, as common signs. Larger collapses can cause chest tightness, lightheadedness, a rapid heart rate and a bluish tint to the skin.
Sudden, sharp chest pain on one side, especially with shortness of breath, calls for prompt emergency care. That applies whether the pain follows a sneeze, a cough, lifting something heavy, or nothing at all.
Key Questions Answered
What happened to the 22-year-old?
Right after a forceful sneeze, he developed sharp left-sided chest pain and worsening breathlessness. An X-ray showed a massive collapse of his left lung.
Did he hold in the sneeze?
No. The report describes a vigorous sneeze, not a suppressed one.
Can a sneeze really collapse a lung?
Sudden pressure changes inside the chest can act as a trigger in susceptible people. This report shows a close timing link, not proof of cause.
Who is most at risk of this kind of lung collapse?
Young, tall, slender men are most commonly affected, and smoking sharply raises the risk.
What symptoms need urgent attention?
Sudden one-sided chest pain that worsens with breathing, especially with shortness of breath or a racing heart, needs emergency evaluation.
Published by Medicaldaily.com
