There are hard lumps in chest, which may be caused by the following reasons:1. Young women are easy to develop breast fibroma, which is often single, and can be touched with regular smooth hard lumps and good mobility, and the size of the hard lumps may change before and after menstruation, which is related to the elevation of the level of estrogen.2. Patients suffering from cystic hyperplasia of breasts, hard lumps in chest are often accompanied with breast distension and pain, and most of the cases of the pain are related to menstruation cycle, and the pain can be taken by oral prophylactics when it is intense, and should be rechecked regularly because of certain possibility of cancer. 3. When the pain is intense, you can take oral prophylactic san, and should be regularly reviewed, because there is a certain possibility of cancer.3, breast ductal papilloma, hard lumps in the chest, but not easy to find, mostly because of the clothing stained with light blood-colored liquid, for this case should be treated with surgery as soon as possible.4, the patient because of the breast ducts do not pass through the blockage triggered by acute mastitis, it is also possible to trigger the mammary gland to produce hard lumps, may be associated with fluctuations, breast swelling and pain.5, patients suffering from breast cystic hyperplasia, often with breast swelling and pain, 5, the patient suffers from breast cancer, the breast can be touched hard lumps, inactivity, as well as the late stage of orange peel symptoms.