A thin slimming needle contains botulinum toxin, which will block the nutrient supply of neuromuscular after being injected into the body, leading to local muscle atrophy, thus achieving the purpose of losing weight. Botulinum toxin itself is slightly toxic, and not all projects are approved by the state. The use of too thin slimming needle will lead to local skin bleeding, infection, muscle disharmony and other adverse consequences, which will have a certain impact on health.