Sorry to hear about your condition but I am glad that you are seeking medical attention for the same. By the description of the boil, it looks like a benign condition (sebaceous cyst
), nothing to worry about. But at the same time it is better to visit a breast surgeon and have the swelling examined. Also you should undergo an ultrasound/ mammogram
of the breasts to rule out any other lumps which are not palpable.
Hope you get well soon.