For those of you who have received fillers, how long did the recovery take? I'm also curious about how long the effects last.

I went to a department store to buy foundation, and the employee examined my neck closely to match my face tone. When she asked, "Would you like to take a look at neck creams as well?" my face instantly flushed. Perhaps because I’ve slept on a high pillow and been glued to my smartphone since childhood, my neck is etched with thick horizontal lines that look just like tree rings. No matter how much I maintain my facial skin to keep it taut and smooth like porcelain, those neck wrinkles make me look at least 10 years older, so now I find myself reaching for turtlenecks. Since I heard that creams absolutely cannot erase deep wrinkles, I am looking into a procedure to fill in the lines one by one using a liquid filler specifically designed for fine lines. Because neck skin is so thin, I am worried about getting a deep blue bruise or having the filler marks leave bumpy, worm-like marks. For those of you who have received neck fillers, how long did the recovery take?