Thanks for writing to us.
From the description it seems , it could be a furuncle
or boil. A furuncle is a bacterial infection of hair follicle and adjoining areas. To treat the same, do warm water compresses of the area and apply an antibiotic cream like mupirocin
or fusidic acid
cream. if painful, take oral analgesic
. usually warm water compresses liquidify the contents inside and help the lesion drain spontaneously. However if the lesion does not seem to resolve consult a doctor near by so that you can be started on oral antibiotic for faster resolution if lesion.