Health potions are used to refill a player's health orb and keep them alive.
A character loses Life through being hit by melee, ranged and magical attacks, but can also be affected by traps and objects bound to the physics engine behaviour.
Where to get Health Potions
Health potions can either be collected in the world from drops or created and purchased at an Alchemist.
Health points can be replenished with Health Globes that drop when monsters are killed. You just need to walk over these globes to gain health back in large chunks.
Health on the Interface
Health potions should be used when the red orb is depleting to a low level. They can be activated with the 'Q' key as shown on the interface.
Other Methods of Health Regeneration
Other means to refill your health blog includes regeneration from gear, healing wells, healing skills, gear that adds life when dealing damage or killing targets, and more.