I wouldn’t say its pink. It is more a dark red; even darker than my iron deposit discoloration.
When/how did this happen? Did you have the dark brown, crispy (unless it was lubricated the way hobby advises) skin after the application of the solution? Was this sore under the affected dark brown skin after it fell off? Did you pull off a portion of the dark brown skin before it was ready to fall off naturally, revealing a raw area?