On the outside, most breast tissue is located towards the armpit and upper breast, and the fat sits mainly in the middle and lower parts of the breast. Many women also have a line of fat at the bottom of the breast called the inframammary ridge , which is due to the breasts folding over themselves. The areola is the darker circle surrounding the nipple, which varies greatly in colour and size. On the areola you may notice small bumps called Montgomery's glands . There are also hair follicles surrounding the areola, and many women grow hair here.
Nipples also have sebaceous glands , which secrete small amounts of lubricating material.
As previously mentioned, breasts change in the same way as the rest of our bodies do through life. Young women's breasts are dense, glandular structures needed for producing milk, but as you age, your breasts become fattier and less glandular. Post menopausal women have nearly no milk glands as they are slowly replaced with fatty tissue as you age. As a result, breasts become softer and less lumpy. Many women also notice changes in their breasts during their menstrual cycle.