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.
Types of Ear Rash. To ensure that you deal with your ear rash effectively, it is important to be aware of some of the underlying conditions that can cause it. These most frequently include eczema, contact dermatitis, ringworm and rubella. Below is a brief overview of each condition as well as some information on specific treatments. 1. Eczema. When you notice a red rash behind ear, oftentimes, eczema is the first culprit to be considered. Also known as atopic dermatitis, this is a chronic condition that causes ...