Acne therapy with sea salt water is a balneology method that has been around for ages. It is not known exactly how sea salt reduces acne. It may be that the high salt concentration helps kill off bacteria on your face, or that the sea salt replenishes minerals that help heal the skin.[1] Sea salt may also be helpful in dissolving skin oils that clog your pores. Too much sea salt can dry out your skin, causing irritation. But with careful use, you may be able to naturally get rid of your acne using the sea salt method.