Also known as nipple blisters, nipple blebs are congealed milk bubbles that prevent milk from being released from your nipple. Nipple blebs are mostly caused by any chafing against your nipple. A thin layer of skin will grow over your nipple duct opening or pore, trapping the milk behind it. Blebs will appear as tiny dots on your nipple and can be painful, causing discomfort while you breastfeed. Your baby incorrectly latching may also cause nipple blebs. To treat nipple blebs, you can use a moist heat compress or take a hot bath and soak your breasts, then express close to your nipple using your fingers. This should help to remove it but if not, then consult your doctor or lactation specialist.