Damage

Damage represents injury from attacks or natural causes.

Health
Players and mobs have a supply of health points, which are reduced when they are injured. Each health point is "half a heart", shown as.

Players have health points, but may vary by status effects. Mobs have varying numbers of health points, but these are not generally visible to players. However, when riding mobs, a player can see their mount's health, and a dog's health is visible in its tail angle.

Damage
Damage from attacks or natural causes will subtract from a player or mob's current health. When their health reaches zero, they die. Players can also recover health naturally by having their hunger at least and the gamerule   is , or through status effects. Most mobs do not recover health except through magic, but horses and dogs can be healed by feeding them.

Armor will absorb some of the damage that would have been done to its wearer, but will take damage itself in the process.

Damage to tools and armor can be viewed in the item's tooltip by pressing the debug key combination.

Stored and Displayed
Health and damage are stored as floating-point numbers in units of half-hearts. When displaying the HUD, fractional values are rounded up to the next integer.

Dealing Damage
Players can deal damage by hitting most entities with targets at close (melee) range. An "unarmed" attack only does damage, but weapons and certain tools do more:
 * Swords are crafted for this purpose. While swords do not extend attack range, they deal significantly more damage than any other item or tool except axes.
 * Axes, pickaxes, and shovels also deal more damage than bare fists. Also, axes deal the most damage, but have the slowest attack speed.
 * Any other item is equivalent to fists and does the same damage. This includes hoes, and hitting something directly with a bow or held arrow.
 * While falling, melee attacks deal a critical hit (150% of the weapon's damage including potion effects, but before enchantments are applied, rounded down to the nearest hit point).

There are a few ranged weapons in the game:
 * Arrows are shot by holding and releasing right click when wielding a bow, and deal a certain amount of damage, depending on the "charge" of the bow (see below).
 * Snowballs only inflict damage on blazes, while eggs don't deal damage to mobs. Both still knock mobs back as if they had been damaged.
 * Splash potions can be thrown, inflicting various effects depending on the potion.
 * Lingering potions can be thrown, creating a cloud that inflicts various effects depending on the potion.
 * Ender pearls don't deal damage to mobs.
 * Fishing rods cannot be used to damage mobs.

A few items can be used to damage monsters indirectly:
 * Flint and steel allows the player to light a block on fire, which causes most entities that touch the fire to be set on fire (with exception to entities with a fire resistance effect or fireproof mobs, mostly those native to the Nether). Entities that are ignited stay alight until hit points of damage is dealt, they touch water, or have a fire resistance effect.
 * Likewise, contact with Lava also ignites players and mobs.
 * TNT can be triggered by fire, redstone, or another explosion.
 * If an entity is next to an End Crystal, it can be hit with something and explode, dealing damage.

The below values detail the damage dealt per hit using various weapons. Critical hits do extra damage. (The values listed here only apply to the Java Edition)

Other items do damage as well:

Attack cooldown


Attacking too quickly will reduce the strength of attacks. The base damage done (as a fraction of the full possible damage) depends on the time between attacks, which is also reflected in the height of the held weapon on screen and the attack indicator bar (which is configurable in the options menu:

The  attribute controls the length of the cooldown time, with the time taken being   ticks. The damage multiplier is then, restricted to the range 0.2 – 1, where   is the number of ticks since the last attack or item switch.

Damage done by enchantments (Sharpness, Smite, and Bane of Arthropods) is also reduced, but not as severely (the multiplier is not squared):

Critical Hits


Critical hits are attacks that deal extra damage compared to regular attacks. Critical melee strikes, regardless of the weapon used, cause small star particles to fly out of the target who was critically hit. "Critical arrows", which occur when arrows are fired from a fully charged bow, leave a trail of the same small star particles as they fly through the air. Critical hits affect all damageable entities including players, mobs, paintings, boats and minecarts.

In melee, a critical hit occurs when a player attacks a mob while falling, including while coming down from a jump, but not while jumping up. The attack deals 150% of the attack's base damage (before enchantments or armor are applied).

The requirements for a melee critical hit are (not all can be done at the same time):
 * A player must be falling.
 * A player must not be on the ground.
 * A player must not be on a ladder/vine.
 * A player must not be in water.
 * A player must not be affected by blindness.
 * A player must not be riding an entity.
 * A player must not be sprinting.
 * A base attack must not be reduced to 84.8% damage or lower due to cooldown.

Immunity
After sustaining damage from any source, a mob will turn red in color for half a second. During this period, any other incoming damage will not be counted against the mob's total health. This immunity only seems to affect combat damage; for example, the player cannot avoid fall damage by taking combat damage just before landing.

For instance, if you attack a mob with a sword repeatedly hitting the button, the sword's rate of fire will exceed the mob's allowable rate of incoming damage, and several of the attacks will not damage the mob even if they land. It is recommended to wait for a mob to be hittable again before swinging your sword, making your hits more precise. The tool used won't lose durability after unsuccessful attacks.

However, if an entity is recovering from damage and then receives higher damage, it gets counted. Players are also subject to damage immunity.

Knockback
When receiving damage from a hostile mob, you will also be knocked back, and similarly a mob will be knocked back when it is attacked. The resulting disorientation and loss of control should not be underestimated, as it is possible to be knocked back over a cliff or into lava, both of which are potentially fatal.

A sprinting attack causes extra knockback. A thrown egg or snowball also causes knockback, despite not damaging most monsters. Entities riding another entity never receive any knockback when attacked.

Natural damage
Besides mob attacks, players can take damage from several other sources.

Lightning damage
Lightning striking on or near the player will do damage, which can be reduced with armor. Lightning strikes on the player are very rare, and only occur during thunderstorms. Players and mobs that get hit by lightning will be set on fire, but will be quickly put out from the rain during a thunderstorm.

Fall damage
Most mobs receive damage when falling from excessive heights. Armor itself does not reduce fall damage, however the enchantments Feather Falling and Protection do. Some mobs are immune to fall damage: chickens, ghasts, blazes, magma cubes, snow golems, iron golems, shulkers, ocelots, bats, and withers. Horses treat all falls as half the actual distance.

Fall damage is calculated based on distance fallen rather than on velocity when hitting the ground. The distance is accumulated based on change in position each tick and rising does not reduce the accumulator, thus an entity bouncing in mid-air on the end of a lead will accumulate fatal amounts of fall distance despite never being more than a few blocks above the ground.

Fall damage is for each block of fall distance after the third. Thus, falling 4 blocks causes damage,  damage for 5 blocks, and so forth. Assuming full health (but no Feather Falling or relevant status effects), a 23 block fall should be fatal (23 - 3 = of damage), but due to the way fall distance is calculated, a 23.5 block fall is required instead.

Falling from smaller damaging heights (4-7 blocks) will play a thud; larger heights (8+) give a click/cracking sound.

In some cases, it is possible to avoid falling or otherwise survive a fall.
 * Sneaking will prevent the player from falling off a drop of one block or greater.
 * Entering or being in water (when not in a boat) resets fall distance.
 * This typically includes falling into water of any depth.
 * Being in the area of effect of cobwebs resets fall distance.
 * Being in lava reduces fall distance by half each tick.
 * Flying using elytra such that the vertical movement is upwards, level, or less than 0.5 blocks per tick downwards resets fall distance to 1 block.
 * Moving into a ladder or vine's area of effect resets the fall damage. This also applies to trapdoors acting as a ladder.
 * Falling onto the top of a ladder will not reset fall distance and counts as hitting the ground.
 * Horses are unaffected by ladders and vines, and so their fall distance is not reset.
 * Spiders climbing a block count the block as a "ladder" for this purpose.
 * An entity riding another entity does not accumulate fall distance. However, when the ridden entity takes fall damage it damages all riders for the same fall distance.
 * A minecart's fall distance is reset when landing on rails.
 * Boats do not accumulate fall distance while in water deeper than 1 block.
 * Teleporting due to a thrown ender pearl resets fall distance, however the teleportation itself causes fall damage to players.
 * Wearing armor that is enchanted with Feather Falling or Protection reduces fall damage based on the level of the enchantment.
 * Having the Jump Boost status effect reduces the effective fall distance by 1 block per level, e.g. falling 5 blocks with Jump Boost II counts as having fallen only 3.
 * Slime blocks negate all fall damage, but will send the entity bouncing into the air.
 * This does not apply to players sneaking.
 * Hay bales decrease fall damage to 20% of normal.
 * Beds decrease fall damage to 50% of normal, and causes the entity to bounce into the air.

Drowning


When a player runs out of air underwater, they will start drowning and will take approximately per second. Mobs can drown as well, though they usually do not, as all mobs (besides iron golems) attempt to swim upward when in water. A squid will die in air instead of in water, and iron golems and guardians will not drown at all. Withers drown, but break blocks around them upon taking damage.

Normally, mobs can remain underwater for 15 seconds before their air supply fully depletes. They can remain underwater for 16 seconds before actually beginning to take damage. The Water Breathing status effect stops the air meter from depleting, and Respiration equipment adds, on average, an additional 16 seconds per level. Neither effect affects squids.

Ladders, signs, fences, trapdoors, doors, and sugar cane can create permanent air pockets underwater, which can immediately refill the oxygen bar. Placing a torch or using an empty bucket on a water block creates a temporary air block, which can be used for the same effect.

In Pocket Edition Alpha 0.8.0, the player actually has 11 air bubbles but once submerged, the 11th bubble instantly disappears.

As of Pocket Edition Alpha 0.16.0, the player can "drown" in lava and while suffocating in a block (the oxygen bar appears); is affected by water breathing potion, however lava or suffocation will usually kill the player before oxygen runs out.

Anvil
A falling anvil deals per block fallen after the first (e.g., an anvil that falls 4 blocks will deal  damage). The damage is capped at, no matter how far the anvil falls. Wearing a helmet will reduce the damage by 25%, but reduces many points of durability on the helmet.

Thorns Enchantment
When a player or mob deals melee or projectile damage to a player or mob that is wearing Thorns-enchanted armor, the attacker will also be damaged. The amount varies with the enchantment level. ( % chance of inflicting – damage, or  damage if level is over 10)

Suffocation
Suffocation occurs when a player or a mob is unable to breathe due to its head being stuck inside a solid block, causing the player or mob to recieve damage every half-second. When inside a block, the player can easily step out of it as the blocks do not prevent their movement.

The player's screen will be a darkened form of the block the player is suffocating in. When the player is in third person, the view will automatically switch to first person.

The usual ways a mob can get suffocated are:
 * Sand, gravel or concrete powder falling into the space the entity occupies.
 * Riding a pig, boat, or minecart, or throwing an ender pearl into a one-block-high space.
 * Riding a horse into a two-block-high space.
 * Standing where a tree just grew from a sapling, or where a huge mushroom just grew from a mushroom.
 * Standing where an End Gateway appeared after killing the dragon.
 * Having a solid block pushed into the mob's head with a piston.
 * Sleeping in a bed surrounded by blocks and/or having a solid block above it.
 * Being teleported or filled into a block via commands.
 * When playing on a distant server, sometimes broken blocks can reappear due to lag, and if the player moves where the block respawned, it can provoke suffocation (for example, chopping down a tree by moving right below the trunk).
 * When water and lava meet, and create a cobblestone, stone, or obsidian block on the entity's head.
 * Standing where a world border getting into more than 5 blocks. (can be changed with )
 * Summoning an entity inside a block through spawn eggs, commands, or with a golem/wither structure laying down.

The  gamerule defines the maximum number, above which a player or mob will take  suffocation damage every half-second, as long as that player or mob is pushing greater than that number of other entities. Pushable entities include players, mobs, boats and minecarts.

Starvation
When the hunger bar becomes empty, the player will take damage every four seconds. The player stops taking starvation damage when the player eats or the health bar drops to on easy difficulty or  on normal difficulty. In hard difficulty and on hardcore mode, the damage will not stop until the player either dies, or eats something.

Cactus
Players and mobs take damage every half-second that they are touching a cactus.

Magma Block
Mobs without fire immunity and players take damage every half-second if they are walking on magma blocks. This can be avoided by having the Fire Resistance effect, sneaking, or wearing a Frost Walker-enchanted boots.

Fire
Mobs without fire immunity and players take damage every half-second if they are standing on fire, and take  damage every second if they are on fire but not standing on fire unless extinguished by water. This can be avoided by having the Fire Resistance effect.

Lava
By far, the most dangerous natural occurrence, except for the unlikely case of falling into the void. Players and mobs will take damage from contact with lava at a rate of every half-second, and stay on fire even if they exit it, causing  point per hit for 15 hits or more ( total damage) unless extinguished by water.

Poison
Cave spiders will poison players when they bite (only on normal and hard difficulty). Eating a spider eye, poisonous potato, or pufferfish; or drinking/being hit by a potion of poison will give the same result. While poisoned, the hearts in the health meter turn from ( on hardcore) to an olive green ( on hardcore) and the player takes  every 25 ticks (1.25 seconds) on level I. See Status effect for a table for higher levels. The poison itself cannot kill the player, but it can reduce them to half a heart, thus leaving them very vulnerable to damage from other sources.

Wither
Withers and wither skeletons will inflict the Wither effect with their attacks. (The wither boss's skulls do not inflict the effect on easy difficulty.) This will darken the health bar to on survival and  on hardcore, while inflicting damage over time. The effect deals every 2 seconds (40 ticks) for the wither skeleton's attack (level I), and every second for the Wither's skulls. Unlike poison, withering can kill on any difficulty level, and the darkened health bar makes it harder to keep track of the damage.

The Void
If one were to break through the bedrock barrier found at the bottom of worlds, the void can be seen. Players in the void below the Y-axis of -64 will take damage at a rate of about per half-second. The player will usually die from falling in the void, even in creative mode, but the player may be saved by throwing an ender pearl before they fall below the Y-axis of -64. In Pocket Edition, the player will take damage at any negative Y-axis.

Falling into the void in the End is more likely, so players must be cautious when entering the End.

By using to give yourself Regeneration 5+ or Instant Health, you can fall infinitely into the void without dying until the game crashes.

Firework rocket explosion
Firework rocket explosions can deal damage to entities.

If a rocket has been crafted with a firework star, its explosion will deal damage within a radius of about 4$1/2$ blocks. At the edge of the radius, it will deal only damage, but this increases as you get closer until the explosion maxes out at its strongest:  damage at distances of 2 blocks or less.

If a rocket crafted with a firework star is d to provide a speed boost while gliding with elytra, it will explode as it is used, dealing damage to the player.

Trivia

 * Critical hits can be done while reflecting a ghast fireball, but won't change the damage or speed of it.
 * In Creative mode, attacking a mob while flying after having descended will score a critical hit.
 * In Console Edition, the player can only take void damage in The End.
 * Quitting the game will reset the fall damage that will be dealt to the player.
 * Maximum damage dealable by player in survival is : from a stone, iron, or diamond axe +  from Strength II, all ×  with critical, +  damage from Smite V on an undead target, or Bane of Arthropods V on an arthropod. The maximum on a non-undead non-arthropod target is only :  from a stone, iron, or diamond axe +  from Strength II, all ×  with critical, +  damage from Sharpness V. A full set of Protection IV diamond armor would reduce the  damage to.
 * With all possible reductions to fall damage currently available in survival (landing on a hay bale, Feather Falling IV boots, Protection IV on other armor pieces, and Resistance II from a beacon) the maximum height the player can fall while surviving without absorption is a little over 800 blocks.

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