hello mam..... The eruption , u are talking about, is it painful or symptomless?? If its painful more likely it can be a folliculitis or infected sebaceous cyst. it might require few tablets to decrease the infection. If symptomless then might be a simple cyst or lipoma. Either condition its better if u can consult a doctor for the examination. If at bengaluru then u can consult me at my clinic as well.