# Knocking Out a Creature *Source: Player's Handbook (2024) p. 370. Available in the Free Rules (2024)* When you would reduce a creature to 0 [Hit Points](3-Mechanics/CLI/rules/variant-rules/hit-points-xphb.md) with a melee attack, you can instead reduce the creature to 1 Hit Point. The creature then has the [Unconscious](3-Mechanics/CLI/rules/conditions.md#Unconscious) condition and starts a [Short Rest](3-Mechanics/CLI/rules/variant-rules/short-rest-xphb.md). The creature remains Unconscious until it regains any [Hit Points](3-Mechanics/CLI/rules/variant-rules/hit-points-xphb.md) or until someone uses an action to administer first aid to it, which requires a successful DC 10 Wisdom ([Medicine](3-Mechanics/CLI/rules/skills.md#Medicine)) check.