I understand your concerns.
Thank you for the detailed history and the pictures.
The area doesn't look infected in the pictures, but rather irritated with scar tissue formation.
You can try a combination of an over the counter ointment that contains zinc oxide to calm down the area and help it heal.
If there's no change in 2-3 weeks, have it seen close up by a dermatologist to see if it needs to be monitored or biopsied.
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