Ay, normal yan kaya don't worry! Usually yan ay either engorged breast (lalo na pagkatapos magfeed or pag nabuilt up ang milk), or sometimes may clogged duct lang na mawawala in a few days with warm compress at frequent feeding, I had it din multiple times tapos sobrang alala ako dati but it passed, talaga. Best thing is check with your OB or midwife lang to make sure, especially if may pain, redness, or fever ka, para ma-rule out any infection. In the meantime, warm compress, proper latch, at frequent feeds usually help na!