Healing

Unless it results in death, damage isn't permanent.

Even death is reversible through powerful magic.

Rest can restore a creature's hit points, and magical methods such as a cure wounds spell or a potion of healing can remove damage in an instant.

When a creature receives healing of any kind, hit points regained are added to its current hit points.

A creature's hit points can't exceed its hit point maximum, so any hit points regained in excess of this number are lost.

A creature that has died can't regain hit points until magic such as the revivify spell has restored it to life.