Stainless Steel and the passive layer Steel is an alloy of iron and carbon. Contrary to carbon steel, the presence of a minimum of 10.5 % chromium in the stainless steel gives it the property of corrosion resistance. Indeed, on contact with oxygen, a chromium oxide layer is formed on the surface of the material.
Sinus Drainage & Stomach Problems. One of the primary results of sinus congestion is drainage. Sinus drainage is expelled in two basic ways: through the nose and the back of the throat. When sinus drainage is expelled in back of the throat, it is referred to as postnasal drip and can cause stomach discomfort.
Sinus drainage in the throat, or post-nasal drip, is the sensation of mucus in the back of your throat that triggers an urge to cough or swallow. While the condition itself is a symptom and not of serious medical concern, post-nasal drip may lead to throat irritation, night coughing and difficulty sleeping.