Dermatitis skin inflammation

Eczema is helped with glutathione & histidine per Erdmann in The Amino Revolution www.amazon.com
Dermatitis may be helped with enzymatic B6 (pyridoxal 5-phosphate)  www.lidtke.com
Derma-tophytic fungi (ringworm and athlete's foot) may be helped with tolnaftate used as an oil. 
Tolnaf oil is an antifungal oil.
Derma-tomyotitus (connective tissue disease with arthritis like symptoms) may be caused after parasites have changed sugar structures.  Glyconutrients such as mannose may  help. pg 25 Elkins, Rita  The New Class of Missing Nutrients. www.woodlandpublishing.com