Is there a chance of regrowth? - M15 UK

Hello, everyone. Around 8 months ago I stupidly used garlic on my scalp in an attempt to cure my condition. It irritated and burnt my scalp, causing bumps, so I stopped using it. However, over the months it has not gone away but instead you could say they’ve gone worse. I recently got my first round of injections, however only the hair around the centre is growing. My dermatologist never said anything about it during my injections, so I thought it was fine, however now I’m worried.