The precautions to be taken after the injection include reasonable diet, good local care, observation of follow-up symptoms and regular review. 1. Reasonable diet: avoid eating high-calorie, greasy, spicy and stimulating food, and avoid smoking and alcohol, especially within one week after taking the leg-slimming injection. 2. Do a good job of local care: the injection site should not be exposed to water within 4-8 hours to avoid bacterial infection. Within one week after the injection, you can’t massage your legs or do strenuous exercise. 3. Observe the follow-up symptoms: some people will have a feeling of fatigue and weakness in walking in the early stage after the injection of leg slimming needle, which is a normal phenomenon and no need to be too nervous. However, if there are progressive or gradually aggravating discomfort symptoms, it is recommended to go to the hospital in time. 4. Regular review: It is recommended to go to the hospital for a review 1 to 3 months after taking the leg-slimming injection to observe the treatment effect. Because some people may not be sensitive to the drug and the effect is not obvious. For specific precautions after taking leg-slimming injections, please consult a professional physician for advice.