In Dark Souls 2, players have two primary methods for healing: Estus Flasks and Life Gems, each serving a distinct purpose and having unique mechanics.

Estus Flasks
– Usage: To heal with an Estus Flask, you must first select it from your item slot and then press the item use button (typically mapped to a designated button on your controller or keyboard).
– Healing Process: Consuming an Estus Flask restores a portion of your health over several seconds (typically taking around 3-5 seconds).
– Upgrades: The effectiveness of the healing can be enhanced by upgrading your Estus Flasks, which can increase both the health restored and the number of uses available.
– Refilling: Estus Flasks are replenished each time you rest at a bonfire, making them a renewable resource throughout your journey.
– Quick Usage: Players can drink multiple Estus Flasks in succession by repeatedly pressing the action button during the drinking animation. The character’s agility level can further decrease the healing time, minimizing vulnerability during recovery.

Life Gems
– Usage: Life Gems act as consumable healing items, which you can use by selecting them from your inventory. Unlike Estus Flasks, they heal health gradually over a short period rather than immediately.
– Quantity and Refilling: Life Gems have a limited supply and are not refilled at bonfires. Instead, they must be found throughout the game world or purchased from certain vendors.
– Strategic Healing: These items are ideal for providing supplemental healing when Estus Flasks are exhausted or when resting at a bonfire is not an option, enabling players to manage their health more strategically during exploration or combat.

Summary:
– Estus Flasks: Serve as your primary and renewable healing source, offering quick healing that can be upgraded for enhanced effectiveness. They are refilled at bonfires and can be used multiple times in quick succession, making them essential during challenging encounters.
– Life Gems: Function as additional healing resources that provide gradual health restoration, limited in quantity and not refillable at bonfires. Their strategic use can be vital in situations where managing health effectively is crucial.

In conclusion, while Estus Flasks are your primary source of healing that can be replenished and upgraded, Life Gems offer valuable backup healing options, allowing players to navigate the challenging world of Dark Souls 2 with flexibility and tactical foresight.