Hi welcome to Health care forum. Your lump caused brown patches suggesting some grouth.
I advise you to consult a surgeon for diagnosis and treatment. You may need to get mamography
besides other routine tests for confermation.
I advise you not to neglect the condition. Besides i advise you some diet recomendations as
avoid taking pulses potato and other tubers and fish to prevent pus formation.
Take more of green leafy vegetables milk egg and chicken. Wishing for a quick recovery and
thanks for calling.