How can women with small breasts become bigger depends on the specific situation, because female breasts, also known as breasts, are mainly composed of fat and mammary glands, and their size has individual differences, related to physical quality, body type, genetics and other factors, if they are in adolescence, breast development is not yet complete, but can also gradually develop and increase. The breasts of women who are breastfeeding may also increase in size to varying degrees because they secrete estrogen, which stimulates the development of the mammary glands. However, if the breast development is small due to thinness or genetic factors, the only way to increase the breast size is through surgery. Note that the surgery should be performed in a professional hospital. There may be certain risks associated with the surgery, including inconsistency in the shape of both breasts, post-operative infection, and implant rupture, so careful consideration is recommended. Women with relatively small breasts can also improve the overall appearance of their breasts in the following ways: 1. Choose the right underwear: you can choose cotton, breathable, supportive underwear and lift your breasts up as a whole by contracting the shoulder straps. Pay attention to the elasticity between the straps and the skin that can pass through a finger, underwear worn too tight is not conducive to breast development; 2, improve physical posture: walk with your head up, open your shoulders and avoid hunching over your chest; sit with a straight back and avoid collapsing your waist; avoid hands around your chest and sleeping on your back to avoid pressure on your breasts, which is not conducive to chest blood circulation. After long hours of work, labor needs to combine work and rest, more deep breathing and chest expansion exercises; 3, exercise chest: common such as running, aerobics, push-ups, and some professional fitness equipment can help exercise chest muscles, especially the pectoralis major muscle, improve the overall sensation of the chest, the breast can be visually enlarged, note that the exercise should be carried out under the guidance of professionals to avoid causing injury; 4, improve diet: appropriate Eat beans, eggs, milk, fish and other protein-rich diet to promote fat accumulation in the breasts, which is conducive to increasing breast fullness and increasing elasticity.