Cellulite is a series of ripples of fat cells and subcutaneous connective tissue under the skin. Usually found on the thighs and butt, especially in women, it has a characteristic 'orange peel' appearance. It affects women  and men as well though it is not  apparent on men, probably because of a difference in cell structure between men and women. 

Fat distribution is different in women and men. Women have more fat deposits under the skin but tend not to accumulate it inside the abdominal cavity; men seem to have less room for fat over their muscles and under the skin but they will accumulate much more excess fat inside the abdominal cavity. Women have a tendency for more fat deposition in the buttocks and thighs. A woman's connective tissue is very inflexible, so as she gains weight and her fat cells expand, they tend to bulge upwards towards the surface of the skin, giving the classic orange-peel appearance of cellulite. In men, not only is there generally less fat on the thighs, but also the outer skin is thicker and thus obscures what is happening to any surplus fat below . Yes, women are more predisposed to cellulite than men. Poor circulation can also  result in a slowing down of this cleansing process and an accumulation of waste materials that thicken and harden into immovable pockets of fat causing the dimple affect

You can check to see if you have cellulite by pinching the skin around your upper thigh. If it looks a bit lumpy, you probably have it. And if you do have cellulite, you're definitely not alone: Most girls and women - and some men - have cellulite. Several factors also influence whether a person has cellulite and how much they have.

The symptoms of cellulite include feelings of tightness and heaviness in the legs. The skin can be tender when pinched, pressed or when massaged vigorously and it can also feel hard and cold compared to other areas of skin. However, it can also feel spongy and doughy

However, it is comforting to know that if you do have cellulite you are not alone as nearly all women develop cellulite at some stage in their lives.

Why not just take care of yourself naturally? 

Insufficient water intake, no exercise, constipation and digestion problems, tension and stress, pollution, incorrect breathing, fatigue, poor eating habits,  estrogen when secreted before each menstrual cycle as estrogen tends to retain water, intoxication of the system are contributing factors in causing cellulite.  However,  you have to understand  that cellulite has a lot to do with genetics, but you can combat some of it with lifestyle changes.