Welcome to Healthcare magic forum,
should be properly taken care of, the cause for it is blockage of oil secreting glands leads to infection of it and acne emerges.
first u have to cleanes ur face with good cleaner available in market.
dont keep touching ur acne, and dont press it to remove the pus, it will lead to mark and scar.
consult ur dermatologist
to start the treatment.
Hope I have answered ur question.