There are several reasons for the sudden softening of breasts: First, there are large changes in hormone levels in women’s bodies, such as menstruation, pregnancy or pregnancy cessation, and changes in breasts are related to changes in hormones in women’s bodies. High hormone levels lead to breast development and hard texture, while low hormone levels lead to soft breasts. When the hormone levels in a woman’s body suddenly change, her breasts will suddenly become soft. Second, the deterioration of the body, changes in the internal environment of the body can lead to breast softening. Third, age reasons, the older adult women are, the more obvious the degeneration of breast breast tissue, the more serious the softening of the breast, women enter middle and old age in the body estrogen gradually fade, breast tissue loses estrogen support, the gland recedes, the content is reduced, the tissue becomes soft. Fourth, endocrine diseases, such as hypothyroidism, premature ovarian failure and other diseases, can cause breast softness. Fifth, systemic diseases, such as malnutrition, anemia, and hypoproteinemia, can also cause breast tenderness.