Oil in the blood mainly refers to the presence of high concentrations of triglycerides in the blood. Triglycerides are lipids formed by glycerol and 3 fatty acids, also known as neutral fats, and are a constant source of energy for the body. However, the concentration of triglycerides in the blood is easily affected by diet, and also easily affected by age and living habits, for example, when after eating high-fat, high-sugar and high-calorie foods, the triglycerides in the outside world increase significantly, they will exist in the blood in the form of celiac particles, and during the examination, the blood is found to have oil, or even milky white, called milk blood. Therefore, when you eat normally, you should pay attention to avoid eating less high-fat, high-sugar and high-calorie food, and the triglyceride concentration in the blood will be reduced to avoid thrombosis or embolic diseases.