breast

my daughter is 10 years old & 11 month she has a lump on one of her breast & it hearts, at the same time there is no sign of her breast starting growth, but when she was 9 month old she had the same symptoms her ped. had to slit the side of her breast & drain the infection, so I'm not sure what this could be.

[Deanna L Aftab Guy, MD]

She is completely appropriate age for onset of puberty and in girls this is breast development, often one side then the other, especially if it hurts more than likely a breast bud. It is doubtful that this is infected, I would have her examined by her pediatrician if there is concern about pain or other problems related with this.