We all know that inhaling a little bit of helium from a balloon will cause our voices to sound at a higher pitch. It's funny and we get a laugh, but there are more serious concerns when inhaling helium. It can be something small, like dizziness, or something big, like death.
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According to Lenntech, some of the mild symptoms from inhaling helium are headaches, sore throats, dizziness, nausea and shortness of breath.
The reason most people inhale helium is to change the pitch of their voice. However, helium can do serious damage to your larynx if used too much. Our voices work when our vocal cords vibrate with air. Helium makes that vibration much faster and as a result causes a sore throat or worse, permanent voice damage.
Lack of Oxygen
One of the biggest problems of inhaling helium balloons is the lack of oxygen. Slate's "Is it dangerous to inhale helium?" explains that when you inhale helium, you aren't getting oxygen and ultimately cannot breath. The majority of incidents result in fainting. Oxygen will return to your lungs quickly and you should wake up in a matter of minutes. If you inhale too much helium in a short time, it can result in death.
An article on the Kidz World website, "How Helium Works," informs us that inhaling helium too fast or from a pressure tank can create helium bubbles in your body. This causes damage to your lungs, and the bubbles can get into your brain through your arteries. The results are bad, resulting in stroke or even death.