Much like previous games apart of the Metroid Series, you will be able to find a few infinite health locations if things turn for the worst. Early within this game, you will come across an enemy that will actually continuously drop out from a small hole in the ceiling. Each and every time it drops, you can get an energy capsule by destroying it. This enemy will continuously respawn, meaning you can keep defeat it to earn more health. On top of this, enemies will respawn after you leave a room. So if you ever need to stock up on health, find an enemy near a door and continue letting them reappear until Samus is doing well.