There is obvious singes of Zinc deficiency in this case. Take 50mg Zinc Citrate or Zinc Gluconate with 2mg Copper away from fibre foods. Rub the affected area with Cod Liver Oil each morning.
Switch brands of hair Shampoo to a medicated one. A hot bath of 1/4 cup Epsom Salts and 1/4 cup Borax once or twice a weak will help. Coconut Oil in foods or as supplement will help. Oil of Oregano soft gels will kill infections in the gut which will boost immune function all over.