Eighty percent of women have cellulite, including really slim models. So it's normal. It's that dimpled-looking skin that can occur anywhere on your body, but mostly on your buttocks and thighs.
Cellulite are fat cells, interspersed with bands of fibrous tissue that run up to the skin, giving it the dimply effect. Whether you have it or not depends on the thickness of your skin and the thickness of the fibrous bands, which are determined by your genes. Despite anything you may have read, it is not caused by toxins that have built up under your skin, nor poor circulation.
Cellulite tends to form at a time of hormonal change - at puberty and during pregnancy. It gets worse if you put on weight, because the fat cells enlarge and bulge more against the fibrous bands. It also gets worse with age, as the skin becomes thinner and less well supported. Dr Rosemary Leonard