Some fug on penis top skin in tip only.

Respected sir , a very good morning , from last 2-3 months I was suffering from one fungl infection infection is around my penis skin on only top. Its start like a small white dot and then it truen to blak and then it started to increase in shape time to time if start to increase in shape. Recently as it happen outside as well as inside I did surgery last few days only I am not getting what is the problem as well as now it's seems as its delay that fugs started on top of my penis also I request if any one suggest please let me know what is the issue I am suffering from and what should I do to come out from this things and to recover myself from this thing. Regards Harsh Patel Also suggest which doctor I should go for