Top 10 Foods that Cause Mucus (Avoid with Asthma and COPD)

These additives can lead to both under- and over-production of mucus, per the study. But all the same, it’s not doing your gut health any favors.

Here are some processed foods to cut back on if you’re coughing mucus after eating (or in other scenarios, like if you experience phlegm after exercise):

  • Candy
  • Soda
  • Chips
  • Fried foods
  • Packaged baked goods
  • Processed meats like sausage and baconFoods that are a natural source of histamine may also cause a reaction that increases phlegm production, according to an April 2018 report in the ​Annals of Dermatology

Here’s what histamine-rich foods can cause phlegm after eating:

  • Tuna
  • Mackerel
  • Pork
  • Chicken
  • Spinach
  • Fermented products like alcohol, yogurt and sauerkraut
  • Mayonnaise
  • Ketchup
  • Citrus fruits like lemons and oranges
  • Strawberries
  • Tomatoes
  • Chocolate

n other words, the reason why you get phlegm after eating certain foods may be because you’re allergic to what you ate. Here are the most common food allergens to look out for:

  • Milk
  • Eggs
  • Soy
  • Fish
  • Shellfish
  • Peanuts
  • Tree nuts
  • Wheat
  • Sesame