Applied Dettol onto my skin and have brown spots. Will these go away? What can be applied to make it heal faster?

I applied Dettol after being numerously bitten by mosquito on the same place. I couldn't take it cause it was so itchy then I applied Dettol. The next morning I woke, it was dark brown like I burned my skin. And now, a few of the brown patches went away when I was washing my face but my skin looks horrible. It's pinkish in the middle and the border of the spot is brown. Any help would be appreciated as to what I should do. Thanks.

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