Fans recently noticed that Cardi B was seen taking in oxygen backstage during a sold-out performance in Denver. According to eyewitness reports from the venue, the rapper briefly used supplemental oxygen before returning to perform for the crowd.
While the moment sparked concern among some fans, the situation may have more to do with Denver’s unique altitude than with any immediate health emergency.
Let’s break down why artists sometimes need oxygen in high-elevation cities—and how Cardi B’s asthma could play a role.
Denver’s High Elevation Can Affect Breathing
Denver is famously known as the “Mile High City.” The city sits about 5,280 feet (1,609 meters) above sea level, which means the air contains less oxygen than at lower elevations.
For visitors who aren’t used to that environment, the thinner air can cause symptoms such as:
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Shortness of breath
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Lightheadedness
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Headaches
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Fatigue
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Faster breathing or heart rate
This condition is often referred to as Altitude sickness.
Even healthy people can feel the effects—especially during intense physical activity like dancing, singing, and performing under stage lights.
Performing at That Altitude Is Physically Demanding
Concert performances require more physical endurance than many people realize.
Artists like Cardi B often perform high-energy sets with choreography, constant movement, and live vocals. Doing that at high altitude can make breathing noticeably harder.
In these situations, supplemental oxygen backstage is sometimes used as a quick recovery tool between songs or after a set.
Athletes, performers, and touring musicians occasionally rely on this in cities with significant elevation.
Cardi B Has Previously Spoken About Her Asthma
Another factor that could contribute to the situation is that Cardi B has openly discussed living with Asthma, a respiratory condition she has managed since childhood.
Asthma can make breathing more difficult during intense activity, particularly in environments that include:
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Dry air
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High altitude
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Heavy exertion
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Stress on the lungs
During recent performances, Cardi B has even mentioned needing brief breaks and ensuring her inhaler is kept nearby by security so she can access it if needed while on tour.
Despite this, she continues to deliver energetic shows filled with choreography and crowd interaction.
Fans Praised Her Determination
Many fans online expressed admiration for the rapper’s commitment to performing despite physical challenges.
Concertgoers noted that the Grammy-winning artist continued delivering the kind of high-energy stage presence she’s known for, even after taking a moment backstage to catch her breath.
Cardi B rose to global fame after the success of her breakout hit Bodak Yellow, and she has since built a reputation for explosive live performances that combine rap delivery with choreography and audience engagement.
Maintaining that level of energy night after night while touring can be demanding for any performer.
Oxygen Use Backstage Is Not Uncommon
In fact, the use of oxygen backstage isn’t unheard of in the entertainment world—especially in high-altitude locations like Denver.
Athletes competing in Colorado, touring musicians, and even stage crew sometimes use oxygen to help their bodies adjust temporarily to the environment.
It doesn’t necessarily indicate a medical emergency; in many cases, it simply helps performers recover faster between physically demanding moments.
A Reminder of the Physical Demands of Touring
Moments like this highlight just how physically intense touring can be.
Artists often perform multiple nights per week, travel constantly between cities, and maintain demanding stage routines while managing their health.
For Cardi B, balancing asthma while delivering high-energy performances demonstrates the level of dedication required to meet fans’ expectations on tour.
Fans Just Want to Know She’s Okay
After the backstage moment in Denver, many fans shared supportive messages online, hoping the rapper is taking care of herself while continuing to perform.
So far, there has been no indication of a serious issue—just a reminder that altitude, asthma, and high-intensity performances can sometimes require a quick breather.
And if the Denver crowd’s reaction is any sign, Cardi B’s fans remain fully behind her as she keeps bringing that signature energy to the stage.
