Mielle, there are all kinds of breast lumps, and most of them are not breast cancer, especially in younger women like yourself. A lump that comes and goes with the menstrual cycle is most likely a harmless cyst. Don't be scared about this lump. Do be concerned enough to pay attention to see if it goes away. If it is still there in a month, check with your doctor. See a doctor sooner if you experience redness, swelling, or a fever. Sometimes lumps can be related to breast infections.
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