Health is a property of Humanoid objects that determines the current vitality of that Humanoid. Whenever Health drops to 0, the Humanoid dies and the Died event fires. In game, when Health drops to 0 in any way except falling from a baseplate, the humanoid will make an "oomph" sound. When a Humanoid being thrown at high speed then the Health drops to 0, the death sound becomes more low-pitched or high-pitched depending on how fast the humanoid is being thrown.
Once a player dies (the player's body parts breaking apart), they must wait 5 seconds to respawn. There is an occasional glitch where the player's body parts do not break apart upon losing all of his/her health.
A user's health regenerates automatically. By using scripts, users can alter how fast this happens or if it happens at all.
ROBLOX's health GUI is a bar representing a player's character's current Health (the size of the green or red bar) and MaxHealth (the size of the current health bar is determined in the proportion of MaxHealth). The Health GUI is placed near the center of the bottom of the Player's screen. The standard health GUI can be edited and even removed by Scripts and LocalScripts.
Since the beginning of ROBLOX, ROBLOX had a hard-coded GUI for the health bar, as in one which could not be modified by the user. Then, as of the introduction to the LUA-GUI, the current health GUI now appears instead. At first, the health bar was on the right side of the screen, which is a green bar that turns red when health lowers. Also, blue text saying "Health" is under it. In the 2nd version, it was made bigger. In the 3rd version, it changed completely, it is now on the bottom and white text saying "Health" is inside it. Also, when a large amount of health is reduced, the health bar flashes red, when the player's health was low, the health bar turned red. A notable change is what looks like blood when the player dies instantly or loses a large amount of health appears on the corners of the screen. On the 4th version, the health bar no longer blinks when a large amount of health is lost, also, the text font changed.On August 27, 2014, the health is simplified with a lighter green color and with rounds edges. The word "Health" was removed, and the bar will now look white when a player loses all of their health.
In 2015, the health bar was put in the leaderboard, below the player's name, with square edges and smaller.