J.H.
My sister just went through the same thing with her 15 month old daughter. The doctor said it was breast buds. But what she said could cause them was lavender. A LOT of baby products have lavender in them. Once my sister stopped using lavender cream and bath wash on her they went away. I never would guessed lavender can do that since it is in so many products for babies. Thought this would be helpful advice!!