Normal breasts are soft and are free from hard lumps. Normal breasts are made up of mammary glands and fat. In adolescent females, the mammary glands are well developed and can be touched under the mammary fat. But the normal breast is no hard lumps, hard lumps may be breast nodules, breast cysts and so on. Patients are advised to go to the hospital in time. Normal breast structure is made up of mammary glands and fat, and mammary glands can be palpated under the fat. However, breast glands and fat are soft and usually do not have hard lumps. A hard lump to touch in the breast may be a breast nodule or a breast cyst. Among them, breast nodules may be caused by breast hyperplasia or breast tumor. Patients are advised to go to the hospital in time to improve the physical examination, breast ultrasonography, mammography and other tests to clarify the cause of the disease. If necessary, fine needle aspiration is needed to biopsy the lesion tissue to clarify the nature of the hard lump.