From TF2 Wiki
Healing is an ability primarily possessed by the Medic class while using either of his secondary weapons, (though there are several other sources of health). By training their healing beam on an ally (or a disguised enemy Spy), the Medic can actively restore the health of allies who are damaged, on fire or under attack. In addition to restoring health, healing also enables the Medic to fill up his ÜberCharge bar. The Medic cannot heal buildings, which must be repaired using the Engineer's wrench or the Gunslinger. This could be considered a form of healing. Also Soldiers using the Equalizer can't be healed.
Medics can also use their Oktoberfest taunt with the Kritzkrieg equipped to heal themselves for 11HP, and their Blutsauger will grant 3HP per successful hit. Medics can also self-regenerate health. A damaged Medic gains 3 HP per second, which scales up over the following ten seconds to a maximum of 6 HP per second, (though carrying the Blutsauger reduces the regeneration rate from 3-6 to 1-4.)
An overheal refers to the state in which a player's health is at 150% of their maximum. Medics can overheal players with any secondary healing tool except the quick fix. The player's health cross on the HUD will glow more brightly as he or she is more overhealed. A particle effect consisting of small team-colored health symbols will surround an overhealed player.
A full overheal will fade away in exactly 20 seconds for all classes, provided that the player does not take additional damage. While a Heavy's health can be boosted to 450, it will return to its base of 300 in the same time as a Scout, whose health can be boosted to 125 from 185. If a Medic heals a character already at 100% health, it will take 1 to 3 seconds to raise them to 150% health (overhealed). The time it takes depends on the class; those with the highest starting health takes the longest to overheal.
During setup time, or while approaching an objective, a Medic can keep multiple teammates on the front line overhealed instead of only their primary healing target. This also increases the speed the ÜberCharge bar rises.
Taunting with the Amputator will not overheal any of your targets in range.
|Class||Normal Max||Over-healed Max|
|(after consuming the Dalokohs bar)||350||450|
|(with the Eyelander equipped)||150||225|
|(after one decapitation)||165||245|
|(after two decapitations)||180||270|
|(after three decapitations)||195||290|
|(after four decapitations)||210||315|
|(with the Claidheamohmor equipped)||160||240|
|(with the Vita-Saw equipped)||140||210|
|(with the Gunslinger equipped)||150||225|
| Scout ||125||185|
|(with the Sandman equipped)||110||165|
|(with the Darwin's Danger Shield equipped)||150||225|
Dispensers and Payload carts will actively heal players who stand near them. Heavies may also consume Sandviches or Dalokohs Bars to regain health, and can drop Sandviches for other players to use. Medics wielding the Kritzkreig can use its taunt to recover their own health and Demomen who decapitate an enemy using the Eyelander or the Unusual Headless Horsemann's Headtaker recover 15hp along with the increase to their max health. A Pyro using the Powerjack can heal 75HP after killing an enemy with it, it will over-heal if the Pyro is at full HP. A Scout using the Mad Milk will heal for 75% of the damage done to a covered enemy, this also applies for any of the Scout's teammates. Most maps are also dotted with varying sizes of health pickups. A Spy can use the Conniver's Kunai to steal the victims health.
For more detailed information on other sources of healing, see the Health page.
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