If you find a new mass in your breast, it’s always best to see your doctor. That said, it’s also important to stay calm. Several benign conditions cause breast lumps. Fibroadenomas are solid breast lumps that typically grow slowly to about an inch. They’re usually firm or rubbery, round with distinct borders, and easily moved.
Fibrocystic breast changes (FBC) can cause thickening, pain and tenderness, nipple discharge, and lumpy nodules that change in size with your menstrual cycle. These changes typically occur in both breasts. FBC is an extremely common condition, affecting about 50% of women in their lifetimes, usually between the ages of 20 and 50.
Many other harmless conditions cause breast lumps. However, any new growth should be checked by your doctor, who can order a mammogram if needed.