| Stamina damage reduces a player character's stamina rather than life.
 Critical hits do not double stamina damage. [1]Difficulty level penalties to resistance apply, so stamina damage is 40% higher in Nightmare and 100% higher in Hell Expansion games (or 20% and 50% higher respectively in Classic games). [2]Only a Sorceress' Energy Shield can reduce stamina damage [3], although stamina damage isn't applied while a Stamina Shrine or Stamina Potion is active.The following monsters have a chance to apply stamina damage with their melee attacks, increasing by 6.25% (1/16) in Nightmare and Hell with each additional player in a Ladder or Single Player game:
 
 
| Monster | Normal | Nightmare | Hell |  
| Chance | Minimum | Maximum | Chance | Minimum | Maximum | Chance | Minimum | Maximum |  
| Swarm | Itchies | 40% | [MonLvl*0.72] | [MonLvl*0.9] | 100% | MonLvl | MonLvl*2 | 100% | MonLvl | MonLvl*2 |  
| Black Locusts | 60% | [MonLvl*0.72] | [MonLvl*0.9] | 100% | MonLvl | MonLvl*2 | 100% | MonLvl | MonLvl*2 |  
| Hell Swarm | 90% | [MonLvl*0.78] | [MonLvl*0.92] | 100% | MonLvl | MonLvl*2 | 100% | MonLvl | MonLvl*2 |  
| Hell Swarm |  | 100% | MonLvl | MonLvl*2 |  
| Giant Mosquito | Sucker | 60% | [MonLvl*3.57] | [MonLvl*4.28] | 100% | MonLvl*5 | MonLvl*6 | 100% | MonLvl*5 | MonLvl*6 |  
| Feeder | 70% | MonLvl*4 | [MonLvl*4.66] | 100% | MonLvl*5 | MonLvl*6 | 100% | MonLvl*5 | MonLvl*6 |  
| Blood Wing | 90% | MonLvl*5 | [MonLvl*5.62] | 100% | MonLvl*5 | MonLvl*6 | 100% | MonLvl*5 | MonLvl*6 |  
 For example, level 85 Black Locusts in the Maggot Lair Level 3 in Hell have 100% chance of applying 96-192 base stamina damage with their melee attacks, doubled to 192-384 by the Resist -100% penalty; in an eight-player Ladder or Single Player game, this increases to 138-276 base stamina damage, doubled to 276-552 by the Resist -100% penalty.
 
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