Hello hope you be fine,,,,actually when we shave or there is rubbing of hair for long time what happens that hairs instead of growing upward grows in your skin and then puss accamulate round it ,,,,the
redness is this ,,,,the black apot is that hair,,,treatment simple apply
local antibiotic cream like polyfax or firstaid three times a day,,,,,then when it becomes soft remove the hair,,,,take care