Conditions

Conditions alter a creature's capabilities in a variety of ways and can arise as a result of a spell, a Character Class feature, a monster's Attack, or other effect. Most conditions, such as Blinded, are impairments, but a few, such as Invisible, can be advantageous.
A condition lasts either until it is countered (the Prone condition is countered by standing up, for example) or for a duration specified by the effect that imposed the condition.
If multiple effects impose the same condition on a creature, each instance of the condition has its own duration, but the condition's effects don't get worse. A creature either has a condition or doesn't.
The following definitions specify what happens to a creature while it is subjected to a condition:

• Blinded
• Charmed
• Deafened
• Exhausted
• Frightened
• Grappled
• Incapacitated
• Invisible
• Paralyzed
• Petrified
• Poisoned
• Prone
• Restrained
• Stunned
• Unconscious