Keloids do not go away on their own. What you may have got is a boil or a cyst. Getting a tattoo has its own set of complications like infections and HIV/ hepatitis B or allergic reaction. Hence discuss the pros and cons and then get a tattoo done.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.
Nightly application of silicon dressing for 2 months helped me with a new keloid