(1) To have a correct understanding of yourself, generally speaking, topical diet pills are only suitable for patients with simple obesity. For secondary obesity caused by various diseases, we must first find the cause. Only by removing the cause can we fundamentally "lose weight". However, even simple obesity has two different manifestations. One is systemic obesity. Most of these patients are obviously overweight, and the effect of losing weight by external medicine alone is often not ideal. Therefore, such patients should adopt other methods to lose weight (such as diet and physical exercise, etc.). ), supplemented by topical diet pills. The other is subcutaneous fat accumulation concentrated in abdomen, buttocks and thighs. This kind of patients lose weight better with external medicine. If applied properly, you can often achieve the ideal weight loss effect in a short time. (2) From the point of view of affecting skin absorption, the hydration degree of skin, the physical and chemical properties of permeate and the water-lipid distribution coefficient between drugs and skin surface determine the absorption of external drugs on skin. Because cream and ointment can increase the absorption of skin and promote the penetration of drugs into skin, it is best to choose cream or oil (ointment) for external use to lose weight. (3) Patients should consult relevant doctors before taking medicine. On the one hand, they should rule out the possibility of pathological obesity, on the other hand, they should know which external slimming drugs are clinically verified and approved by the health and industrial and commercial departments to be truly effective. Don't be greedy for small things and lose big things. Blindly buying topical slimming drugs without any clinical verification or approval of medical and health departments will not only hurt individuals, but also affect their health.