Choosing the right underwear is crucial for women as it is directly related to breast health and body comfort. The bottom circumference, cup, steel ring, heart and shoulder straps are important parts to judge whether the bra is suitable. The bottom band should not slide up or be too tight, the cup should hug the breasts perfectly, and the underwire should be located under the sternum to provide appropriate support. The shoulder straps should support the chest stably and prevent them from slipping. When buying underwear, you should pay attention to the material and design, choose breathable and moisture-absorbent materials, and avoid designs that are too tight or too loose. If you find that your underwear is empty, cup-pressed, or slipping up, you should replace it with appropriate underwear in time to protect your breast health.