
There are two ways of dealing with this: get some liquid antiseptic and dab directly onto the spot 4 or 5 times a day. When it starts to reduce in size apply the antiseptic 2 or 3 times a day, then 1 or 2 times a day when it has almost healed.
Or, you can go to a doctor who carries out minor surgical procedures and they will deal with this for you …