According to Serrador, once a month is the magic number for facials —if you don't suffer from breakouts or other major skin issues. “If you do. I am 32 years old and have oily skin and usually get a facial done every month. My friends mentioned that getting a facial every month may. But, is getting a facial really necessary every four weeks? Does it vary You really NEED a facial once a month (if not more), if your skin has.