Well, I learned something new today, that when you have an underactive thyroid, your allergies kick your butt! I was explaining to the doctor, my new symptoms, and one was the way my allergies are kicking me hard. At least now I know it isn’t all in my head when a blade of grass triggers the rash and itching. It now explains the congestion in my lungs, to where my ribs hurt. Why didn’t someone tell me about this before? - Dear Thyroid