I have stabbing pain in my left breast, behind my nipple. I have given myself a thorough self-exam, but have found absolutely nothing out of the ordinary. The pain covers such a large area behind and under the nipple, that if it were caused by a lump, you would think it would be discernable. Pain is more like "target zone" pain, only hurts when, for example, I hold my baby against my chest. I am 34 and everything has always been normal, including a good family history. Drink lots of caffeine though! What could cause this other than a lump?
Thanks in advance,