Generally, the breasts are soft because they contain mainly a large amount of fatty tissue. If there is more fatty tissue in the breasts, the breasts may be softer, but may be less elastic and more prone to sagging symptoms. If you exercise regularly and have more developed breast ligaments and muscles, your breasts may be firmer to the touch and may have better elasticity. Patients may experience a hardening of the breasts during or around menstruation due to changes in endocrine levels, which is a normal physiological phenomenon. Some patients may touch small hard lumps outside the breast, which may be glands or small nodules in the breast. If the hard lumps are small and not accompanied by other symptoms, no special treatment is usually necessary, but care should be taken to review them regularly to prevent the nodules from growing and worsening. In addition, some patients may have hardened breasts due to certain diseases, such as breast enlargement, mastitis, breast tumor and other diseases, which may lead to hard lumps in the breast, resulting in hardened breasts, often accompanied by other symptoms such as pain, etc. It is recommended that patients go to regular hospitals for relevant examinations, such as chest ultrasound, blood tests, tumor screening, etc., to clarify the cause of the disease and provide early treatment.