There are five types of bumps on the breast, roughly as follows: First, sebaceous cysts in the breast combined with infection, in the breast skin rich in sebaceous glands, if combined with infection can appear in the breast skin redness and swelling, and can be palpable lumps of tough texture. Second, breast fibroids, which are large, smooth and regular lumps, can be palpated in the breast. Third, intraductal papilloma, a soft, irregularly shaped lump can be palpated near the nipple, and when squeezed, a pale blood-colored fluid can be seen oozing from the nipple. Fourth, breast hyperplasia nodules, which are usually found in women of childbearing age, can be palpated in the breast as bead-like nodules and are often accompanied by breast swelling and pain. Fifthly, breast cancer is a painless lump in the breast with hard texture and poor mobility, which may be accompanied by orange peel or dimple signs. Therefore, if you have a lump on your breast, you should go to the hospital for an ultrasound examination of your breast in time to get a clear diagnosis and active treatment.