The production of fine facial lines is related to frequent laughing, thinning of the skin, fat reduction, dermal breakage due to developed expression muscles and photoaging. It is usually believed that people with dry skin are prone to fine lines, those with oily skin have coarser wrinkles, and those who lose weight too quickly suddenly lose fat, which can also rapidly produce facial fine lines and cheek lines. Botox injection can eliminate facial fine lines with good results, but there are also the following risks: 1. Too much injection dose can cause facial asymmetry, upper lip sagging and muscle contraction disorders. For example, blocking the zygomaticus major muscle will lead to upper lip sagging and blocking the laughing muscle will lead to unnatural smile. Generally, the symptoms can be gradually relieved by themselves after 2-4 weeks; in serious cases, systemic toxicity symptoms appear. 2.Injection adverse reactions may occur, such as local numbness, pain, swelling, erythema, etc. Generally disappears on its own within a short period of time; 3. If the injection site is the forehead or eye, there may be a feeling of forehead drop, deepening of wrinkles in the adjacent area, ptosis, eyebrow shape change, lower lid ectropion, and aggravation of lower lid bag. After successful surgery, the effect usually starts to appear 48-72 hours after injection, which shows that the facial wrinkles become lighter and flatter and the skin becomes smoother. However, botulinum toxin injections have a short maintenance time and need to be re-injected at intervals of about 6-8 months.