How long does it take to get a hydration injection depends on the individual’s body type, age and skin type, and can be injected 1-2 months apart, depending on the individual. Under normal circumstances, 1 injection of water light can be maintained for about 1 month, 3 consecutive injections of water light for a course of treatment, can play a drug effect of superposition, in hyaluronic acid, collagen is metabolized and decomposed, greatly improve the water content of the skin, improve skin quality. Most patients will have the second injection 1 month after the first injection, and the third injection 1 month after the interval. 1 course of treatment after attention to maintenance can be maintained for about 1 year, can achieve a better cosmetic effect. After the injection, patients need to pay attention to the diet to light food, avoid spicy, stimulating food, avoid drinking alcohol, smoking, etc.. The wound should be careful not to get wet, avoid direct sunlight, and do measures to protect the face from the sun.