I burned my skin I guess?

So two days ago I applied on my pimple tea tree oil (it supposed to help it heal i guess) and it was burning af but I ignored it. Then, after an hour or so, i noticed irritation and it was real red and it was like all over my cheek, so i guess i burned my skin with this thing. On the next day i noticed on this area 2 dark (a bit darker than my skin) spots, and today they got darker and the skin's still red af and is itching. I'm freaking out what this thing on my face is and if it is possible to get rid of it...
I burned my skin I guess?
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