had few patched over 1 yr, but now getting worse on DH's scalp....red underneath with yellowish skin flakes on top. Have tried special shampoo & we rub olive oil in everyday (under instructions from h'dresser) but nothings working.... He also has the odd indentation and yellow crustiness uinder fingernails, been to doc and they took clippings, its not and infection of any kind...please does anyone have any advice or sugestions?