Tried changing your diet? Yeah I know, lot of people say it's hogwash.
But it's the easiest, non-invasive change you can make. What have you got to lose?
Try it, not only for a week though

Plenty of water too
The Remedy: Changing Your Diet
Does It Work? Most Likely
"The nutrients you're putting in your mouth eventually show up on your skin," says Jessica Wu, MD, a Los Angeles-based dermatologist, and author of Feed Your Face. That said, there simply aren't enough studies to pinpoint any one specific food as an acne-instigator for absolutely everyone, she says. To get one step closer to clearer skin, cut back on foods with a high glycemic index (think cookies, cake, and chips) and dairy, suggests Diane Madfes, MD, a dermatologist and clinical instructor at Mount Sinai Medical Center. While these two types of food may not necessarily cause acne, studies show an association between them and breakouts. Load up on foods full of inflammation-fighting omega-3s, like wild salmon or trout, Wu advises.
Sauce:
Tea trea oil:
Does It Work? Yes!
Tea tree oil, a fragrant essential oil derived from the tea tree, is an effective acne treatment, and one that's been backed up in the lab, too. But while it's good at killing acne-causing bacteria, it can also irritate the skin, says Polisky.
The bottom line: This is one natural remedy you can't DIY, since the pure ingredient is too strong to swab on alone. Instead, find it in a soothing treatment like Dermalogica's Breakout Control , which pairs the ingredient with zinc sulfate to reduce redness and minimize irritation.