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.
Medical professionals sometimes refer to eczema as the itch that rashes.. Usually, the first symptom of eczema is intense itching. The rash appears later and is red and has bumps of different sizes. The rash itches and may burn, especially in thin skin like the eyelids. If it is scratched, it may ooze and become crusty. In adults, chronic rubbing produces thickened plaques of skin.