Heal

To heal in any RPG is to restore lost "hit points" or life. It usually involves magical spells or similar effects, such as short periods of time or eating supposedly non-magical food to increase

Healing Spells

In many RPGs there are dedicated caster classes for healing, and they are traditionally not overly popular. In Diablo II, there were a few classes with some sort of "heal other" spells, but not overly efficient. No class in Diablo II is a dedicated healing class. The popular MMORPG World of WarCraft has several classes that can specialise into healing, but they can also generally specialise into something else, like DPS or tanking.

Some monsters are known to heal their own kin as well.

Other Sources of Healing

Both Diablo I and II have an extensive potion system, and the main source of healing wither come from regen, Life Steal or potions. There are also shrines which can heal you, and add quick life regeneration for a period of time.

In Diablo III there will be less use of potions, and higher use of Health Globes. Balls of health dropped randomly by monsters and which increases life.