If you take a Pokémon to a raid, a battle, or any activity that requires them to fight in Pokémon Go, they can either faint (requiring a Revive item to bring them back) or take damage that needs healing.
Unlike the main series of Pokémon games, Pokémon Go has no Pokémon Centers for you to go to heal your Pokémon back to full health. If you are a new player, topping up your Pokémon’s health can be confusing if you don’t know what to do. Luckily for trainers, there is an easy way of healing your Pokémon.
Players will receive healing items called Potions by spinning a PokéStop, fighting in a Gym, taking part in Raids, or through Gifts. These potions are split into different types, including regular Potions, Super Potions, Hyper Potions, and Max Potions, each healing your Pokémon for a fixed amount.
Should your Pokémon be knocked out, it must be revived using a Revive or a Max Revive, which can be obtained in similar ways to Potions. Revives will only bring a Pokémon up to half of its Max HP, therefore requiring a few Potions after use. Alternatively, Max Revives will fully restore the HP of a defeated Pokémon, yet are much harder to come by.
When you collect one of these items, go into your item screen and click on it. A new screen will then pop up with any injured Pokémon you might have. Clicking on the Pokémon you want to heal will use that Potion or Revive and restore its health. Using any of these items consumes them, and you will need to find more healing items if you want to continue healing your Pokémon.