The chest is dry and sagging only skin may be due to weight loss, in the postpartum breastfeeding stage, the body’s hormone imbalance and other reasons. 1. Sudden weight loss. Sudden weight loss due to stressful life and recent increase in physical activity may cause sudden weight loss of the breasts, resulting in sagging and shriveling of the breasts. 2. Breastfeeding after giving birth. Breasts originally contain milk and become larger in size when milk is secreted. After the child is weaned, the breasts suddenly retract, due to part of the elastic fiber retraction is too fast, the body retraction ability is weak, the enlarged breasts as well as the ligaments can not be completely retracted, thus appearing the above symptoms. 3. Hormonal imbalance. Estrogen or post-partum progesterone is lowered, sagging and drying of the breasts may occur. Other diseases, such as diabetes, hyperthyroidism, etc., lead to sudden weight loss, which can cause symptoms such as sagging breasts. You should go to the hospital in time and follow the doctor’s instructions for treatment.