In reference to food, ânitrateâ really means sodium nitrate, but should really refer to sodium nitrite. While these are two completely different chemical compounds, they are often used interchangeably by those outside of the science realm. 1  Sodium nitrate is a type of salt, naturally found in Chile and Peru.
Symptoms. Diagnosis and Treatment. Prevention. 1  Patches of chronically itchy, dry, thickened skin, usually on the hands, neck, face, and legs (but it can occur anywhere). 2  In children, the inner creases of the knees and elbows are often involved.
Eczema Symptoms. Skin reactions to gluten often start slowly as itchy rashes that may start as blisters on the knees, elbows or back. As exposure to gluten continues, the eczema worsens as blisters form lesions, new blisters form and the rash spreads across more of the skin.