The clog may appear at the very tip of your nipple, known as a «Milk Bleb» which is clogged pore, or the clog could be further back in the ductile system. (justbreastfeeding.com)
I've seen mums with scabs covering the entire tip of the nipples, coming out misshapen post feed. (theleakyboob.com)
You can also try rubbing the tip of the nipple on the roof of her mouth, which stimulates her sucking reflex. (dadsadventure.com)