MYTH: Food can be left at room or outdoor temperature for more than two hours. REALITY: Because bacteria grow rapidly in the danger zone between 40 degrees F and 140 degrees F, food left at room temperature for more than two hours should be discarded.
Postnasal drip also commonly causes excess mucus at the back of your nose and throat many times after eating. Excessive, thick phlegm or chest mucus can often be caused by viral or bacterial infections such as influenza, bronchitis and pneumonia, as well as irritants such as those inhaled during smoking. Chemotherapy also causes the immune system to overreact and excessive phlegm is often the result.
Many of us may wonder what the exact causes of phlegm in throat are, often considering it to be an underlying problem of a deeper cause. However, phlegm is always present in the body and only becomes a concern when there is an overproduction of it. In such cases, phlegm is also mixed with saliva. 2  In case you are coughing up phlegm that is brown, you may also notice that it is grainy in texture. 3  This means that dust and some other foreign matter are mixed with the phlegm. 4  This is often caused by damage to cilia, which generally happens with COPD patients.