Welcome to healthcare magic forum
Thank you for your query
i understand your concern regarding skin problem.
It look like you have hair root infection
Initially you feel pain or burning over it.
color change from red to dark black or brown.
it is mostly attached with hair strand.
you can apply antibiotic cream over the affected area.
do not rub or press over skin on affected area
better to consult dermatologist
for proper treatment.
peeling of skin will help you in reducing spot.
I hope I answered your query