The term cellulite refers to the deposition of fat and water at the layer directly below the skin that is accompanied by reduced elasticity of the connective tissue.
It's caused by poor local blood circulation, which means that the fat cells of that area are not "well fed".
The abnormal fat accumulation causes these fat cells to increase in volume and start compressing the blood vessels, which prevents the exchange of nutrients and exacerbates the problem of poor blood circulation.
Cellulite usually appears in the thighs, buttocks, the inside of the arms, stomach and abdomen.
Causes:

• Sedentary lifestyle
• Reduced physical activity
• Heredity
• Abnormal circulation of the blood
• Hormonal disorders
• The presence of obesity
• Malnutrition
• Smoking
• Constipation
• Increased daily consumption of alcohol, caffeine and soft drinks

How to get rid of cellulite fast:

• Lose weight: the first thing you need to do is to seek to obtain an ideal body weight, determined by body mass index (BMI).
  The body mass index is your body weight divided by the square of your height.
  To get to the ideal weight your BMI needs to be below 25.
  If your BMI is higher than that, then you are classified as overweight or obese.
  As we said above, cellulite is a form of fat and losing your excess weight is necessary if you want to get rid of this condition.
  
• Increase your water intake.
  Water is an essential substance that plays a key role in human metabolism.
  
• Stop or at least reduce smoking to a minimum.
  
• Limit your intake of salt and salty foods, which can cause fluid retention.
  
• Limit your intake of fats and especially saturated or animal fats.
  This means that you should avoid fatty meats, fried foods, mayonnaise, butter, eggs, and full-fat dairy products.
  Saturated fats should be less than 10% of your diet, because they contribute to the development of obesity and other illnesses such as cholesterol and heart problems.
  Instead, try to eat more monounsaturated fats (like olive oil).
  
• Pay attention to carbohydrates.
  You should avoid simple sugars and replace them with carbohydrates from complex sources, such as fiber and starchy foods.
  This will keep you full for longer and contribute to the healthy function of the intestines.
  Keep in mind that constipation contributes significantly to the development or worsening of cellulite.
  Also try to eat plenty of fruits, vegetables, whole grains and legumes.
  
• Increase your physical activity, by taking up some sports (like tennis, swimming) or even brisk walking.
  
• Limit your daily alcohol consumption.
  
• Forget about soft drinks and coffee.