They feel more like rocks than grapes. They are also often painless. Pin On Medical Info However in a small percentage of women a painful breast lump turns out to be cancer. Breast cancer lump feels like . A cancerous lump may feel rounded soft and tender and can occur anywhere in the breast. In some cases the lump can even be painful. Skin changes in the breast such as puckering dimpling a rash or redness of the skin. 4 breast infections can cause redness and swelling. A new lump or thickening in your breast or armpit. They re often easy to move around mobile and may be tender. It may feel like a frozen pea or lima bean or be smooth and very firm like a marble. The way that lump feels can provide plenty of information. You should tell your doctor about any lump you feel in your breast. In contrast to breast cancer tumors benign lumps are often squishy or feel like a soft rubber ball with well defined margins. Breast cancer tumors are rigid with firm angu...