Whether a hard lump in the chest is normal or not needs to be determined by its etiology and nature. This is because hard lumps in the chest may be caused by normal physiological factors or by pathological causes. Therefore, it should be correctly discerned to avoid delaying the condition. If breast enlargement occurs during adolescence or physiological period, this condition is normal and generally no special treatment is needed. It is enough to pay attention to keep a cheerful and optimistic mood, eat reasonably, strengthen physical exercise and have regular checkups. If, in addition to breast lumps, there are also symptoms such as nipple overflow and skin changes, breast cancer is usually considered. In addition, breast lumps can also occur during breastfeeding, which is usually caused by milk stagnation and can be relieved by massage. Most of the hard lumps in the chest are normal physiological phenomena, so there is no need to worry. If it is a pathological condition, it is recommended to have immediate treatment to prevent missing the best treatment time.