@jensfcv, Hello Jen, and welcome to our group. I too struggled with excess phlegm for 20+ years. I used to take antihistamines daily to dry up the muck. It helped, but turns out that is the wrong thing to do. Antihistamines can cause the phlegm to solidify and form 'mucous plugs' that in turn cause infection in the lungs. Not only that, but they made me dingy as well. Seventeen years ago, I read books by Dr. Andrew Weil and learned that diet has a lot to do with our health. He stated that the leading cause of many diseases are due to unknown food allergies. He said the most common culprits are DAIRY, EGGS, GLUTEN, and SUGAR. (food dyes are another one) Many of our members on the site agree that those foods do cause them phlegm. He suggested keeping a food diary and doing an elimination diet to see if you notice any changes. I did just that 17 years ago. I noticed a difference by the end of one week. My biggest culprits were gluten and sugar, and food dye. To help ease the symptoms of phlegm, I use 'Breathe Easy' tea by Traditional Medicines. Can be purchased in the natural food isle at Krogers. Plus, doing a twice daily saline breathing treatment with a nebulizer helps clear out the gunk. You can ask your doctor if 7% sodium chloride in a nebulizer would be good for you. Please keep in touch and let us know how you are doing. Just curious, how did you learn about Mayo Connect?