Sometimes my daughter does this because she is overtired and doesn't really want to nurse as much as sleep. She nibbles and then pulls away and I usually take her off the breast, put her to sleep, and feed her when she wakes again.
She also used to do this when we had thrush, due to the discomfort.
Sometimes it's gas, and a minute upright for the trick to get it out.
Sometimes she does it and I have no idea why. I just lay her down or cuddle her until she seems to calm down, and then we try again.
It's annoying isn't it? It drives me crazy when we are NIP, and instead of having this nice, efficient, 20 min session, it throws off whatever I am doing by like an hour.
Writing about life-long learning and discovery at: www.neoapprentice.com
:: A neo-apprentice knows there are no true masters.
25yo FTM to a Wiggle Panda , student teacher , newlywed