Breast sagging, medically known as breast ptosis, is identified in different degrees that include:
Grade 1: Mild ptosis that occurs if your nipple lies slightly above or directly in front of the breast fold
Grade 2: Moderate ptosis that occurs if the central point of your nipple is 1-3 cm below the top of your breast crease
Grade 3: Severe ptosis that occurs if the central point of your nipple and your areola is more than 3 cm below your breast crease
Pseudo–Ptosis: This type of ptosis occurs when the nipple is still above the inframammary crease, but the breast appears to droop because of a large, flattened breast lobe