Term: Temporary HP

Temporary HP, Temp HP, or Temporary Hit Points; are a pool of HP tracked separately from one's Normal HP and, if necessary, their Armor HP.

When you take damage, you reduce your Temp HP first, before your regular Hit Points. If you have Armor HP, you may choose which is subtracted first. Most temporary Hit Points last for a limited duration.

You can’t regain lost temporary Hit Points through healing, but you can gain more via other sources. You can have temporary Hit Points from only one source at a time. If you gain temporary Hit Points when you already have some, choose whether to keep the amount you already have and their corresponding duration or to gain the new temporary Hit Points and their duration.