A lump that is hard, fixed, and does not move easily
A lump that grows quickly or changes in size
A lump with irregular or uneven edges
A lump that is painless but persistent
A lump associated with skin changes such as redness, dimpling, thickening, or ulceration
A lump associated with nipple discharge, especially bloody discharge
A lump associated with unexplained weight loss, fatigue, or fever
A lump in the breast, neck, armpit, groin, testicle, or elsewhere that lasts more than 2 to 4 weeks
A lump that is larger than 2 cm or keeps getting bigger
A lump that feels attached to surrounding tissue
A lump that causes numbness, weakness, or trouble swallowing
A lump that returns after being removed
A lump that is new in an adult and has no clear cause
A lump that is accompanied by swollen lymph nodes
A lump that bleeds, crusts, or does not heal
A lump that should be evaluated by a doctor promptly if any of these features are present