It is not an uncommon phenomenon to moles to appear and they can appear at any age group. However keep an eye on the moles. Melanomas are usually >6 mm in size, with irregular borders ,asymmetrical and dark in color.
If you notice changes in the mole's/mark’s color, height, size or shape, you should have a dermatologist evaluate it. You also should have it checked if it bleeds, oozes, itches, appear scaly, or become tender or painful.
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.