What will happen if I inject carbonated water into my vein?

Injecting carbonated water into your veins can be extremely dangerous and is not safe. It can lead to air embolism, where bubbles block blood vessels, potentially causing severe complications like stroke or heart attack. Additionally, introducing any foreign substance into the bloodstream can lead to infections and other serious health issues. Always seek medical help if you're considering any form of injection or have concerns about your health.