A kind of pimple or something on my right nd left chek that happens regularly on same place after some intervals.i concert to many doctors but the result is zero..it happens since 5 years .when it start ..the skin became tight nd slowly slowly it's increase in size ..after few weeks many dead cells or pus came out..after two or three dressing it will fine..but again some months or days it's again start in same place..one thing is that it is completely painless on effected area