Our skin is our largest organ for detoxification. Skin 'issues' are almost always due to toxic overload. The best way to address this is to fast, giving the body the opportunity to 'clean house', and it's usually advised to assist in this detoxification process by taking either bentonite clay or activated charcoal tablets to help absorb the toxins being broken down. These can also be taken when not fasting, too. It's a common practice to keep a dedicated water glass with bentonite clay that's mixed up, made 'colloidal', drinking at least one glass of that clay/water mix every day.
I started with the 'Master Cleanse', (lemon/lime juice, grade B maple syrup, and 1/8th teaspoon of cayenne) as the only thing consumed other than water, along with bentonite/charcoal and often some psillium husks to act as a 'broom' helping to sweep the intestinal walls during the cleanse. My first Master Cleanse I went on lasted 21 days, and I added to these practices what's called a 'sea salt wash'. This is simply drinking 1 liter of water + 1 Tablespoon of sea salt quickly first thing in the morning, passing this digestive wash of the entire 'alimentary canal' helping to rinse the 'pipes' unobtrusively. You'll want to stay close to a toilet for a couple hours to give this digestive rinse a chance to pass through and cleanse your digestive tract. The first Master Cleanse I went on I was passing solid waste every day for 3 weeks even though I'd not eaten solid food at all the whole time. I was sold on these disciplines for life, kept doing them for 10-14 days 2x a year, and have not been 'sick', seen a doctor, or taken ANY over the counter or prescription medications for 35 yrs now.
I can almost guarantee that IF you can make it at least 1-2 weeks on this liquid diet your skin 'issues' will clear up and likely never return if you continue this discipline annually for decades to come. Once you experience the difference these cleansing practices make you'll not need to take my word, or anyone else's, on how beneficial this is for your health.
Good luck, enjoy the process, and celebrate the development of Will that this discipline will solidify in your character. Your mind and your will taking the helm controlling your body's desires will make all other acts of discipline and exercising of your Will easier. You'll also begin to notice how much of our social lives, and advertising media, revolve around food and to realize that overconsumption is the root cause of almost all dis-ease.
https://archive.org/details/mastercleanserwi00burr
https://www.scribd.com/document/737556612/The-Master-Cleanse-Movement-with-Tom-Woloshyn-Getting-Started-Guide