Can I heal this?

I have tinea versicolor, it got worse since it's summer so I applied selsun blue on my neck, chest, and back. It was burning and kind of itching so I hurried and rinsed it off. Now my skin is darker where the skin disorder is, and its also bleeding kind of. My skin is really rough now. How do I get the dead skin off and heal it? And also my neck is SOOOO much darker now, its really disgusting. PLEASE HELP!

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