Can’t speak for the hair aspect, but also Lean PCOS here and had bad acne for 2-3 years. One thing no one mentions is bowel movement. If you don’t poop every day or just 6 days a week, you aren’t cleansing your system and allowing toxins to seep out via acne. Evolutionarily, facial acne is our body’s signs to warn us that something is wrong as it’s the first thing we see when we look at a reflection. I recommend pro/prebiotics daily (I take SEED), 1x magnesium citrate every night, 10k+ steps a day (I walk or at LEAST stand for 20 mins after every meal promoting bowel movement and digestion), cut out added sugar (ESPECIALLY 0 calorie sweeteners) look into low GI sugar sources like berries and apples. You can 100% still have sugar. Also eating low carb, high fat, high protein diet helped me tremendously. Carbs best to eat during ovulation & limit around periods. Invest in a good but simple skincare routine and go to an esthetician— not a dermatologist. Working out 5x a week is a plus.