Marve’s Spider-Man: Miles Morales is a pretty short game, and it borrows several elements from the first game, Marvel’s Spider-Man, including the pretty unique health system. Marvel’s Spider-Man: Miles Morales uses a similar mechanic for health regeneration.
There is a focus bar on the top left of your screen, used to regenerate your health and perform special moves. You start off with only one bar; however, as you progress through the game, the focus bar capacity keeps increasing.
How to heal
To heal in Spider-Man: Miles Morales, all you need to do is press the down button on the D-pad. This will instantly heal you. The best part about the healing system is that you can heal at any time you want, even while you are amidst a combat animation.
How to build up the focus bar
The best way to build up the focus bar is by performing combos and doing perfect dodges. Dodging is quite easy in the game, thanks to Miles’s Spider senses, which alert him before an incoming attack. Just when it turns red, press Circle to dodge. A perfect dodge gives you a significant amount of focus and can help you fill it up quite quickly.
Do note that the focus bar doesn’t need to be full in order to heal. The focus bar is also used for other stuff, such as Venom attacks, so you need to use it quite strategically.