Health

Health in Battlefield games is a measure of a soldier's life in hit points (HP). So long as a player has health, they can take action as normal. Various sources of healing (usually provided by the Medic class) allow a player to regain health.

A similar game mechanic is used for vehicles, with a gauge representing how much more damage they can receive before being destroyed. This is generally referred to as "armor", though actual armor protection remains the same. A wrench or repair tool can be used to restore a vehicle's health.

A player's (and vehicle's) health always appears in first-person view HUD, and can also be seen by teammates.

Weak points
In general, infantry receive more damage to the torso, neck, and head. In many games, a headshot from a sniper rifle is a one-hit kill, though medics can inexplicably revive headshot victims. Body armor may reduce the damage a player receives.

Vehicles also have weak points where AV weaponry may deal additional damage. S

Alive
The player has at least one hit point. A heartbeat sound typically plays when the player has less than 10% health, to remind the player to find a source of healing. In most games, players do not otherwise recover health.

Killed
The player has expired or committed suicide, and has been removed from the battlefield. First-player view is disabled, and the player only sees the surroundings near where they died.

At this point, a spawn screen appears, allowing the player to select a spawn point and respawn if possible. The player can also use their loadout screen, text chat or leave the game.

On game modes where reinforcement tickets are used, being killed expends a ticket.

In certain games, a killcam shows who killed the player, allowing them to plan ahead for their next respawn.

Critically wounded
On games featuring the defibrillator, a player is considered critically wounded for 15 seconds after losing all of their HP. A downed soldier can call for a medic, and very little else. If a medic does not revive the downed soldier in time, the soldier dies and is considered killed.

Until those 15 seconds has passed, the player keeps their reinforcement ticket, if used.

Spectating
Players that cannot respawn can continue spectating. Certain games or servers may restrict what a spectating player can see, or may return the player to the spawn screen after some time.

Players who join mid-round are also considered spectating.

Battlefield 2
Battlefield 2 introduces defibrillators and the "critically wounded" state.

Different types of body armor are also featured, allowing the player to choose between a health or mobility advantage.

Battlefield 2142
Various gadgets in Battlefield 2142 allow players to see an enemy's health.

Battlefield Heroes
In Battlefield Heroes, the various classes have different amounts of health. Hit indicators also show how many points of damage an attack has inflicted.

Abilities can be used to restore health, improve resilience, or increase damage. Bandages can be used by a player to restore their own health.

Battlefield 3
Health regeneration is added to Battlefield 3 allowing players and vehicles to recover health, albeit at a much slower rate than with a medkit or repair tool.

A new Suppressive fire feature can negate regeneration.