I suffer the same thing chronicly. One of my ultrasounds came back looking suspicious, so I had to follow up with a biopsy. Thank God they were benign. But I have to have them checked at least every six months. But anytime I overdo it or I get overly stressed my lymph nodes automatically get swollen and I get flulike symptoms up without a fever. I did a little research and it turns out it is one of the many ugly symptoms of fibro. I feel like my body is always attacking me in one way or another.

@A MyFibroTeam Member Fibromyalgia often, but not always, occurs in tandem with severe fatigue, brain fog (sometimes called “fibro fog”), and/or multiple chemical sensitivity. Other symptoms can include:
Sleep disturbances, which can be both cause and effect of the pain
Irritable bowel syndrome, or digestive disturbances and pain; this is essentially fibromyalgia of the bowel
Numbness and tingling
Swollen lymph nodes
Mood swings, depression, and anxiety
The pain of fibromyalgia often worsens with even a small amount of exertion, and it takes a lot longer to recover after exercise compared with a healthy person. Hope that this helps and can help you to relax and not worry. Hugs

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A MyFibro...

I have had the same symptoms for many years. Flulike symptoms and swollen glands whenever I overdo. It lasts for weeks

When I was 13 or 14 I had mono. A lot of people I've talked to have had mono also. One of the main symptoms of mono for me was : horrible fatigue, swollen and painful lymph nodes, and all over pain. Its a lot like fibro. Has anyone else had mono in your life and now have fibro?

I just read something kind of scary. There's a Dr. In my city that has a clinic dedicated to ME/CFS research. I went to his website and he said he has found a significant number of CFS patients have undiagnosed thyroid cancer. 6000 in 100000 compared to the general population which is 1 in 100000. Yikes!