My sixteen year old boy is complaining about some pimples around the private area which he is saying started some three days ago and now have grown big and painful if he wears clothes. He said this also happened some six months ago and they disappeared without consulting a doctor.
Hi, Welcome to Chat Doctor forum.  As you describe they appear to be the boils of cellulitis, a bacterial infection under the skin. The previous one also appears to be the same. And controlled due to the body resistance.  I advise you to consult a dermatologist for diagnosis and treatment.  I usually prescribe to my patient with such symptoms, cephalexin,and fanatic acid.  Wishing for a quick and complete recovery. Thank you.