Son was diagnosed about 3 years ago with Severe Guttate Psoraisis. Dr. believed it was from Strep throat infection which son had between 2 wrist surgeries. The psoriasis spread very quickly and he was treated with Methotrexate. He lost 20 lbs while on the medication and had lots of stomach issues. Drug requires constant testing of the liver to be sure the drug is not affecting its function. The drug did clear it but it is very hard on his body. Later he had an outbreak again and this time we are using vitamin D3 2000 iu daily and it is working. We also purchased a narrowband UVB light and used it regularly. Pine tar soap has also helped scaling and soaking the scalp in Apple Cider Vinegar for 30 min then rinsing has helped the scalp. Former very thick scales are now reduced to what looks like a skin burn peeling. We are currently trying LIMU to see if it will help.