When the blood starts getting thick and the amount of grease in the body increases, this disease is called cholesterol. Cholesterol is a disease that varies according to your age and gender. This disease usually happens after the age of 35-40. It is not found in the kids because the blood present in their body is quite thin. Eating food that contains excessive fat should be avoided because that can lead to increase in body cholesterol levels. If you have very high body cholesterol, then it should be treated as soon as possible.