There will be no side effects. However, you are only 17 years old and a boy. Your skin is very elastic and protective. At most, it is easy to get oil, acne, blackheads and large pores. In fact, you don't need to use Sif Spring hyaluronic acid to tighten the water at all. This effect is mainly aimed at women, over 20 years old. If you like, just use some cleanser with good cleaning power, and nothing else is needed.