A skiing trip turned into a hospital admission for a 25 year old man in Turkey. Doctors diagnosed him with cannabis induced pneumomediastinum, a rare condition in which air escapes into the space around the heart and major airways.

Addicta: The Turkish Journal on Addictions published the case. Hasan Emre Yildirim and colleagues at Suleyman Demirel University in Turkey described a previously healthy young man who developed sudden breathlessness and neck pain while on the slopes. Doctors later confirmed a marijuana chest air leak tied directly to his cannabis habit.

A Day on the Slopes Turns Into an Emergency

The patient arrived at the emergency department with crackling under the skin of his neck and chest. Clinicians call this telltale sign subcutaneous emphysema. Chest X rays and a CT scan confirmed the diagnosis. Air had leaked into his mediastinum, the space between the lungs that houses the heart, major blood vessels and airways.

Only during a more detailed conversation with clinicians did the true cause emerge. The man admitted he was a regular cannabis user. He smoked and vaped the drug two to three times a week, and had used it just hours before his symptoms began.

What Is Spontaneous Pneumomediastinum

Spontaneous pneumomediastinum, often shortened to SPM, occurs when air escapes from the lungs without any trauma, surgery or medical procedure to explain it. It tends to strike young, otherwise healthy people. Sudden chest pain, breathlessness and a crackling sensation of air trapped beneath the skin are the usual first signs.

Cases of cannabis induced pneumomediastinum have become more common in medical literature in recent years. The authors of this report say physicians are increasingly recognising cannabis as an underlying trigger, particularly in young men.

How Cannabis Use Triggers the Macklin Effect

Doctors call the mechanism behind SPM the Macklin effect. A sudden spike in pressure inside the chest causes tiny air sacs in the lungs to rupture. The escaping air then tracks along the airways and blood vessels until it reaches the mediastinum.

Doctors believe cannabis use brings this on through the very techniques users rely on to intensify the drug’s effects. Deep inhalation followed by prolonged breath holding, which doctors call the Muller manoeuvre, drives up pressure inside the chest. So does forceful exhalation against a closed airway, known as the Valsalva manoeuvre. Heavy coughing plays a role too, as does the vomiting associated with cannabinoid hyperemesis syndrome, a condition seen in some long term users.

Ruling Out More Serious Conditions

The symptoms of SPM overlap with far more dangerous conditions. Doctors treating the young skier had to rule out a collapsed lung, a torn oesophagus known as Boerhaave’s syndrome, injury to the airway itself, and even heart related emergencies. Vomiting combined with chest pain and subcutaneous emphysema is a particular red flag for oesophageal rupture, a condition that can be life threatening if missed.

In this case, stable vital signs and the absence of other worrying findings meant doctors did not need invasive tests.

Treatment and Recovery

Management of a marijuana chest air leak like this one is usually conservative. Doctors admitted the patient for observation. They gave him oxygen and pain relief, and told him to avoid eating or drinking until his condition stabilised. Over three days his symptoms eased, and follow up scans showed no further air leakage.

Before discharging him, doctors gave him a clear warning. Continuing to use cannabis raised his risk of the condition returning. They advised him to attend regular check ups. At follow up appointments, doctors found no further problems.

A Pattern Physicians Are Seeing More Often

This is far from an isolated case. A 2019 review published in BMJ Open Respiratory Research examined 14 cases of marijuana chest air leak among cannabis users. This underlines that the association is not a one off, but a recognised and recurring pattern.

The authors of the new case report note that patients frequently do not volunteer information about drug use unless directly asked. This means doctors may poorly recognise cannabis induced pneumomediastinum, or mistake it for a less specific chest complaint.

Why This Case Matters

The report’s authors argue that a detailed substance use history should be routine for young, otherwise healthy patients with unexplained chest pain. Missing the link to cannabis can lead to unnecessary tests, or a missed chance to address the underlying habit.

For young people who smoke or vape cannabis regularly, this case is a reminder. The risks extend well beyond the immediate high. A single episode of cannabis induced pneumomediastinum usually resolves without lasting harm. But the authors are clear that the danger returns each time cannabis use continues. Choosing to stop, rather than manage the habit, remains the surest way to avoid a repeat trip to the emergency department.

Source: addicta