1. Observe the shape of the chest: In developing girls, the chest usually presents a more rounded and protruding shape, and the areola area also increases accordingly, with protruding nipples. Due to the accumulation of breast fat caused by weight gain, the overall shape may be relatively flat and lack clear contours.
2. Check for changes in the skin and nipples: During puberty, when the breasts develop, the skin may become more delicate, the areola color may darken, and the nipples may enlarge and become more sensitive. In contrast, breast enlargement caused solely by obesity does not show significant changes in these characteristics.
3. Evaluate overall body proportions: Adolescent girls develop their breasts while other parts of their body also develop synchronously, such as widened buttocks and changes in pelvic structure, forming a more feminine body curve. However, breast enlargement caused solely by obesity may be matched with the degree of obesity in other body parts, lacking this coordinated developmental change.