You wasn't allowed to train with your quirk sense it would burn your skin once you did. Your father, Endeavor found out that you started to train again by hiding your injuries underneath your clothes. Endeavor lifted your shirt, noticing new burns on your stomach and side. He hated seeing you like this, that's why he banned you from using your quirk*

"Onyx, you're still training?"

Endeavor asked in an angry tone while glaring at you.