Healing

Healing refers to the ability to restore health to a unit. Healing (heals) are distinct from other forms of health restoration. Healing cannot restore a unit's health over its maximum, as with all other health restoration. In addition, life steal, spell vamp and health regeneration are considered different types of health restoration, and have their own articles you can refer to.

Champion abilities that can heal others
Note: Only the healing effect of these abilities is shown here, to read more information on each of these abilities, follow the link on each of them.
 * restores 60 / 90 / 120 / 150 / 180 (+0.2 per ability power) health to Alistar, and half that amount to nearby allied minions and champions.
 * makes her channel for 4 seconds, restoring 70 / 110 / 150 (+0.35 per ability power) health per second to herself and nearby allied minions and champions.
 * when enhanced by, heals herself and all allied minions and champions in the cone for 35 / 55 / 75 / 95 / 115 / 135 + 5% (+0.02% per ability power) of their current missing health.
 * restores 60 / 105 / 150 / 195 / 240 (+0.35 per ability power) health to target allied champion.
 * restores 50 / 85 / 120 / 155 / 190 (+0.7 per ability power) health to target allied champion.
 * "life taps" a target for 5 seconds, healing any allied champions who attack it over 3 seconds for a total of 6 / 10 / 14 / 18 / 22 (+1.5% of his maximum health). If Vorpal Blade kills a target, Shen is healed for 33% of the normal amount over 1 second.
 * will empower himself for 20 seconds, for the duration he will heal nearby allied minions and champions for 25/37.5/50% of the damage he deals with autoattacks.
 * heals herself and the allied champion with the lowest percentage of health in range for 40 / 60 / 80 / 100 / 120 (+0.25 per ability power).
 * restores 70 / 140 / 210 / 280 / 350 (+0.45 per ability power) health to target allied minion or champion.
 * restores 200 / 320 / 440 (+0.7 per ability power) health to all allied champions.
 * restores 60 / 100 / 140 / 180 / 220 (+0.6 per ability power) health to himself and target allied minion or champion. If he targets himself, he heals for 140% of that value.
 * marks a champion for 7 seconds, if the champion reaches 0 health in that time they will be suspended in time for 2 seconds, untargetable, and then they will have their health restored by 600 / 850 / 1100 (+2.0 per ability power).

Champion abilities that only heal the user
Note: Only the healing effect of these abilities is shown here, to read more information on each of these abilities, follow the link on each of them.
 * heals him for 32 + (2 x level) health whenever he kills a unit.
 * in which he hurls his cleaver. If it hits a target, it refunds 50% of the health cost.
 * heals him for 40/55/70% of his max health over 12 seconds.
 * heals herself by 150 / 225 / 300 whenever she kills a champion or scores an assist.
 * makes him channel and leash to a target for up to 5 seconds to deal 60 / 90 / 120 / 150 / 180 (+0.5 per ability power) magic damage per second. He will heal by 60 / 65 / 70 / 75 / 80 % of the damage done.
 * regenerates 7 + (1 × level) health over 6 seconds each time she deals physical damage. Striking champions will cause this effect to stack up to 4 times.
 * shields an allied champion or himself for 4 seconds. While shielded, Galio heals for 25 / 40 / 60 / 75 / 90 (+0.3 per ability power) each time that unit suffers damage (-20% healing for each consecutive hit).
 * heals him for 80 / 150 / 220 / 290 / 360 (+1.0 per ability power).
 * restores 2% of his maximum hit points over 4 seconds every time he uses an ability.
 * heals him for 10 / 15 / 20 / 25 / 30% of the damage enemies within the area take from any source. Healing from damage dealt to minions is capped at 60 / 90 / 120 / 150 / 180 per cast.
 * passively heals Irelia for 5 / 7 / 9 / 11 / 13 health whenever she performs an autoattack. Activating gives Irelia 10 / 14 / 18 / 22 / 26 health regen per autoattack for 6 seconds.
 * heals Irelia for 25% of the damage dealt to champions and for 10% of the damage dealt to minions.
 * heals Maokai for 7% of his maximum health whenever he attacks with 5 charges of Magical Sap. He gains one charge each time a spell is used near him.
 * makes him channel for up to 5 seconds restoring 28 / 56 / 84 / 112 / 140 (+0.33 per ability power) health each second.
 * deals magic damage to the target, equal to a percentage of their health, and then curses the target to deal more damage each second for 10 seconds. He heals himself for the damage dealt.
 * causes Nocturne's next attack, once every 10 seconds, to strike all surrounding enemies restoring health per target hit. Autoattacks reduce the cooldown by 1 second each hit.
 * heals himself for 125 / 180 / 235 / 290 / 345 (+1.0 per ability power) after being used on a minion.
 * heals Renekton for 5% of the damage dealt up to a hard cap, which is 50 / 75 / 100 / 125 / 150. When Renekton has more than 50 Fury he deals 50% additional damage and heals for 10% of the damage dealt instead, also the healing hard cap is tripled.
 * marks enemies it hits for 6 seconds. Any further damage dealt to marked targets by Skarner will consume the mark to heal himself for 30 / 45 / 60 / 75 / 90 (+0.3 per ability power). Subsequent marks consumed will heal for 50% of the last.
 * , which sends out up to 3 ravens per second (one per target) dealing 50 / 75 / 90 (+0.2 per ability power), as long as Swain is in raven form. Swain heals for 75% of the damage dealt to champions and by 25% of the damage dealt to minions.
 * heals Trundle for % of the maximum health of any non-allied unit that dies near him.
 * deals 100 / 175 / 250 (+0.6 per ability power) magic damage to his target and then deals the same damage again over 6 seconds. Trundle heals for the damage dealt.
 * upon activation Tryndamere consumes all of his Fury to heal himseld for a base ammount of 30 / 40 / 50 / 60 / 70 plus 0.5 / 0.95 / 1.4 / 1.85 / 2.3 per Fury consumed.
 * which heals Udyr for 10 / 12 / 14 / 16 / 18 % of the damage he deals with autoattacks while in the stance.
 * makes Vladimir sink into a pool of blood for 2 seconds, becoming untargetable and dealing 80 / 135 / 190 / 245 / 300 (+15% of bonus health) magic damage over the duration while healing himself for 12.5% of the damage dealt.
 * heals Vladimir for 15 / 25 / 35 / 45 / 55 (+0.25 per ability power) after used on a target.
 * restores 30 % of his maximum health over 6 seconds. This will trigger when Volibear's health bar drops below 30%.
 * causes his autoattacks to deal additional 3 / 3.5 / 4 / 4.5 / 5 / 5.5 / 6 / 6.5 / 7 / 8 / 9 / 10 / 11 / 12 / 13 / 14 / 15 / 16 magic damage and heals him for the same amount. Each successive attack against the same target will stack this amount of healing and damage up to a maximum of 3 stacks. The stacks remain for 4 seconds.
 * , which strikes an enemy and heals Warwick for the greater of 75 / 125 / 175 / 225 / 275 (+1.0 per ability power) and 8 / 11 / 14 / 17 / 20 % percent of the target's maximum health (can only do flat damage to monsters).
 * heals Xin Zhao for /  hit points on every third attack.
 * summons a Ravenous Ghoul behind his target dealing 55 / 85 / 115 / 145 / 175 (+1.0 per bonus attack damage) magic damage to them and heals himself for 40% of the damage done. In addition the ghoul heals Yorick for the damage he deals.

Items

 * restores 250 health and 200 mana over 8 seconds when your champion levels up.
 * restores 150 health over 15 seconds to your champion.
 * restores 250 health and 200 mana over 8 seconds when your champion levels up.
 * increases the effectiveness of all healing and regeneration effects (including life steal and spell vamp) on yourself by 15%.

Spells

 * The summoner spell restores 100 + 25 x level Health to your champion and and 50% of that to nearby allied minions and champions. All targets healed by this will have a 50% reduction on other  for 35 seconds.

Healing reduction
Healing reduction effects reduce the effectiveness of all healing. Such abilities do not stack, though they will refresh the duration. All such effects (except Crystal Scar's Aura) halve the effectiveness of healing, health regeneration, life steal and spell vamp.

Champion abilities

 * , while active, reduces the healing and regeneration of all targets he auto attacks by 50% for 5 seconds.
 * , when enhanced with will reduce the healing and regeneration of all targets hit by 50% for 5 seconds.
 * , while active, reduces the healing and regeneration of all targets she auto attacks by 50% for 3 seconds.
 * reduces the healing and regeneration of the target by 50% for 5 seconds.

Items

 * active reduces healing and regeneration of the target by 50% for 8 seconds.
 * active reduces reduced healing and regeneration by 50% for 8 seconds.

Spells

 * reduces healing and regeneration of the target by 50% for 5 seconds, and deals 50 true damage (+20 x level) over the next 5 seconds.

Neutral buffs

 * Crystal Scar's Aura reduces every champion 20% healing effect while playing on the Dominion game mode.