My g'ma had breast cancer at 60, my aunt got it at 41, another aunt about 50. dr said my r nipple problem is eczema; at 27 should i have a mammogram?

You should see: a breast specialist, if you have not already. An uncommon form of breast cancer, called Pagets disease of the nipple, can present as eczematous-type changes in the nipple region. They can determine if imaging(likely ultrasound as the initial test in your age group) is needed.

Paget's disease: could be mistaken for nipple eczema. With a strong family history, you need to see a specialist breast surgeon for evaluation, including imaging and even possible biopsy.