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.
Rating Newest Oldest. Best Answer: Sinus infections can cause you to have an upset stomach, just as you said from post nasal drip and also maybe the antibiotic that you are taking. Sinus infections could also cause you to have headaches and can lead to eye infections, and ear infections, etc.