Is a small hard lump in the armpit a symptom of breast cancer?
No need to worry.
Thanks for asking on HealthcareMagic.
I have gone through the query and understand your concerns. It is likely to be a lymph node swelling and your research has indicated correctly about the association with breast cancers. However, there are other causes that could cause a lymph node swelling. In your case it is probably due to a minor localized infection of the hair follicles or soft tissue. Since you have not found any breast swellings, I would reassure you that you need not get concerned.