1 Sodium nitrate is a type of salt, naturally found in Chile and Peru. 2  It can also be created in a lab. 3  Sodium nitrite is also a type of salt, but is not found naturally and is created in a lab or as a byproduct of two other chemical reactions (i.e. when sodium nitrate is added to food and reacts with existing chemicals).
Eczema on the ear or in the ear can initially be caused by the skin being extra sensitive. Often the natural oil is stripped away through over cleaning or aggravated by getting water in the ear, wearing ear plugs, using cotton swabs or Q-tips or from the chemicals in shampoos, soaps and even hair spray.
Other types of eczema. Eczema is the name for a group of skin conditions that cause dry, irritated skin. Other types of eczema include: 1  atopic eczema (also called atopic dermatitis) â the most common type of eczema.2  contact dermatitis â a type of eczema that occurs when the body comes into contact with a particular substance.3  discoid eczema â a type of eczema that occurs in circular or oval patches on the skin.ther types of eczema. Eczema is the name for a group of skin conditions that cause dry, irritated skin. Other types of eczema include: 1  atopic eczema (also called atopic dermatitis) â the most common type of eczema.