Hi, the skin tag may be a growth or a periapical swelling. Please consult a dentist
as soon as possible. if it is a periapical swelling, the related tooth needs to be treated or extracted depending on the condition. If it is a growth without a tooth problem, a biopsy
needs to be done to check the nature of the growth. Remember, it may have cancerous potential. So please do not delay the investigations. All the best!