Is it common for a 5wk old to reject one breast whilst being happy on the other? He is hungry, he latches on enthusiatically for a few seconds then pulls a face and pushes away. On the other breast he is as content as can be. I have expressed from the offending breast and he is fine with the milk from a bottle. This has been going on for 3 days. I have changed positions, checked the nipple for scabs etc - there is nothing there but part of the very end is black - bruised I assume where he has been chewing this nipple.
Is this common and is it just a phase or is there something wrong with my breast?