There is a lump under the left breast. What's going on?

Breast cancer may be caused by breast hyperplasia, breast fibroadenoma, breast cancer and other reasons.

1. Breast hyperplasia

is a common breast disease in women, which may lead to breast hard mass, accompanied by breast pain and other symptoms. This is usually related to endocrine disorders, mental stress, bad habits and other factors.

2. Breast fibroadenoma

is a benign tumor, manifested as a palpable round or oval hard mass in the breast, smooth surface, good mobility. Its occurrence may be related to hormone levels, genetic factors.

3. Breast cancer

is relatively rare, but breast cancer may also be manifested as hard mass. Such hard mass breast texture is usually hard, unclear boundary, poor mobility, may be accompanied by nipple discharge, skin changes and other abnormal manifestations.