2 months back I got a red boil in my right arm pit, later it disappeared and again after a month again at the same place I got a red boil on the same place..I took amoxicillin 500 and it was gone but a small lump still appears inside the same area...its not seen outside..but it's very small and hard inside the skin I feel...is it dangerous..what it can be..at present lockdown condition how can I help myself to overcome this..