Explosion

Explosion is a Quirk used by Katsuki Bakugou.

Description
The quirk allows the user to excrete sweat similar to nitroglycerin from their body and ignite it to create various explosions at will especially for innovative uses such as propelling oneself. The more the user sweats, the more powerful the explosions are. .

However, during winter season, the nitroglycerin-like sweat requires slightly longer time to ignite. As opposed to the summer heat, where conditions are optimal for ignition.

Disadvantages
As the quirk proved to be powerful and possibly fatal with the use of tools such as Grenadier Bracers, repeated ignition (especially with large explosions) will eventually result in wearing out the user's palm due to direct skin contact, causing pain to the user's arm and shoulder.

As mentioned by Katsuki Bakugou, the Grenadier Bracers serve to reduce the risk of overusing his quirk as well as amplifying the effects of explosion. However, triggering the bracers firing pin creates a strong recoil that tolls the user's shoulder, although Katsuki seems to be completely unphased by it due to his superior physical ability.