How many days does it take for swelling to subside after hyaluronic acid injection?

　　Hyaluronic acid (HA) filler injection is a common aesthetic medical procedure, primarily used for facial filling to improve facial contours and reduce wrinkles. The general reference price for HA filler is 2000~8000 yuan per milliliter. Initial results can be seen immediately after injection, but it may take 7~14 days for the swelling to fully subside and for the final outcome to become apparent. The duration of post-injection swelling varies from person to person, typically lasting 1~2 weeks. For individuals with better metabolic capacity, swelling usually subsides in about one week, whereas for those with poorer metabolism, it may take around two weeks. Detailed analysis is as follows:

　　Individuals with good metabolic capacity experience faster cell renewal and repair. After HA injection, the body needs to repair and adjust the local tissues. Those with faster metabolism have fibroblasts that can synthesize collagen and other substances more quickly, promoting tissue repair and remodeling, while also accelerating HA absorption and integration, allowing swelling to subside rapidly, typically within about one week.

　　Conversely, individuals with poor metabolic capacity have slower cell renewal and repair rates, and their fibroblasts synthesize collagen and other substances at a relatively slower pace. This prolongs the process of tissue repair and HA integration, resulting in swelling that takes about two weeks to resolve.

　　After the procedure, patients should avoid massaging or pressing the treated areas, as well as refrain from strenuous exercise, exposure to high temperatures, alcohol consumption, and other stimulating factors, which could exacerbate swelling or interfere with recovery.