Welcome to HCM
We understand your concerns
From the description you gave, it is hard to identify the problem. You started something about color and stopped short.
The bump could be a boil, abscess
, internal or external cyst
, keloid etc.
As you said there is pain, this might be internal or external abscesws or boil.
You should consult a physician or surgeon so as to diagnose it properly and get treatment.
Get well soon.