Hard Pea Sized Lump In Both Breasts,breast-fed 1 Year Ago,more Bead-like Hard Lumps,stressed
Thanks for your query.
Breast lumps are common in women of your age and you have done right thing consulting physician regarding this.
There are two types of lumps benign( most common) and malignant. 95% of malignant diseases are diagnosed in women over 40 years of age and median diagnostic age for carcinoma breast is 61 years. I do not feel these lumps are related to lactation.
As you said your mother has been diagnosed of pre invasive breast cancer, I like to mention that certain cancers have familial tendencies and BRCA -1 and BRCA-2 are the genes associated with it. Having a family history of breast disease is an important indicator for the diagnosis of breast lump. Recurrent history of breast cancers in the family are more suggestive of hereditary transfer of breast cancer. Except for the mother's history, you have not reported of other family member having breast cancer.
There is a possibility of having lumps related to milk in the breast, but as I mentioned earlier it is unlikely to be related to breast feeding. If at all there are lumps related to milk, they are of Endocrinal disorder.
The ultrasound examination of the lump and if necessary a fine needle aspiration of the lump will confirm the nature and type of lump. So be patient and do not lose hope. From where I see there are likely to be a benign non concerning problem.
Hope I had answered your queries. I would be available here to answer if you have any further questions.
Regards