Losing weight is not harmful to your health, but the thinner the better. After obesity, blood lipid and blood sugar are high, which is not good for health. When blood lipid and blood sugar are high, blood viscosity is high. For a long time, this situation is easy to cause arteriosclerosis, coronary heart disease, cerebral thrombosis and other diseases. If you are obese, long-term obesity can easily lead to hyperglycemia, hyperlipidemia and hypertension, and it is also easy to increase the burden on the heart, so it is good to lose weight in this situation and it is better for your health. You can lose weight by controlling your diet and exercising more. However, if your weight is normal and you lose too much weight, it will easily lead to malnutrition or endocrine disorders, and then various diseases will occur.