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"Here are the possible reasons behind the excessive production of phlegm and the consequent need to spit out sputum post meals.
You must cut down on your intake of fried foods. Excessive consumption of oily foods also lead to the thickening of mucus, thereby affecting the drainage of mucus. Such foods can irritate the lining of the mucus membranes and may cause the membranes to produce more mucus. Cut down on intake of alcohol or caffeinated drinks as that can also dry up mucus and affect its drainage. This can cause mucus to accumulate at the back of throat. If you have been consuming foods that you might be allergic to, you are most likely to experience this problem.
Acid reflux disease, also known as gastroesophageal reflux disease (GERD), is a medical condition that is characterized by the regurgitation of the gastric juices into the esophagus. When the gastric juices from the stomach back up into the esophagus, it gives rise to a burning sensation in the chest. It is believed that consumption of fatty foods, acidic foods, caffeinated drinks or alcohol may aggravate this condition. "
http://www.buzzle.com/articles/phlegm-in-throat-after-eating.html
http://www.buzzle.com/articles/phlegm-in-throat-after-eating.html