WWE used to incorporate blood frequently in their matches to add to the storylines they were presenting.
However, in the new PG era, blood is strictly off limits, as Cody Rhodes and Randy Orton found out a few weeks ago when their segment was edited completely from SmackDown.
The "Crimson mask," as it was well known, would be a feature in many pay-per-view events, as it usually signified a more intense battle than you would see on Monday Night Raw.
The superstars would blade themselves to make it look like a weapon had done the damage to their foreheads.
Usually the sweat would make the blood flow like wine and the crowd would instinctively cheer on as the two men raged in a bloody battle.
However, as you will see in this slideshow, sometimes they cut too deeply, resulting in massive amounts of blood loss. Here is a list of the 25 bloodiest matches in WWE history. Enjoy!
Disclaimer: Every slide will contain at least one drop of blood, so please use caution when viewing the article.