I used to have a lot of skin inflammation all over my body. I eventually found that raw dairy/pasteurised dairy was responsible, and got rid of the skin-related issues after c.4 months of going dairy-free RPD. It would be a good idea to get an allergy test as well as a food-intolerance test just in case. Don't overeat, as water-fasting allows the body more time and more resources to deal with some health-problems. Besides, quality is way better than quantity, as regards raw foods. Raw foods anyway contain much higher nutrient-levels than cooked foods, so it is silly to gorge all the time.
Of course, for all I know, this skin-problem may be due to nutritional deficiency on a raw vegan diet, so just continuing with raw foods may eventually get it to disappear in time. Given decades of physical abuse on a cooked diet then vegan diet, most RPDers find that major health-problems take on average c.2-3 years to resolve.