I'm 19 years old and I have a pustle on my breast. It is located on my nipple, but not on its main tip. When I squeezed it, a little bit of pus came out. I kept on squeezing it, when the pustle swelled up a little and the area became a little red. It's been one whole day and when I touch it with minimum force, it hurts back. When the shower water was hitting my pustle, it was hurting me a little. Is this a symptom of breast cancer? Please let me know. thanks.