Combination of explosions and hardening

Pros:
-user can create explosions from sweat
-user can harden skin
-user can use explosions for attacks and defence
-user can make explosive lava from cracks in skin of user
-blood is explosive
-skin cells can become rock hard when off user

Cons:
-user will deafen themselves easily
-ain't flashy part of it
-user can't control explosions well
-user loses blood once it is made into lava
-user will damage themselves with blood
-user can't control these skin cells

Weakness: control
User can't control quirk well