Started treatment but now...

My initial therapy was Taxol and Herceptin so maybe different from what you are receiving. But I can share that, from the first infusion, I had intense stabbing pain in my breast while I was still sitting in the chair with the IV in - and later when I went home, I had pain in both my breast and pelvic area where one of the mets was located. This occurred during the first few infusions. When I asked my doctor, she nodded and said other women had reported the same. I had a good outcome, so I would say the pain was from the tumor cells being "zapped" by the meds and dying off. I had never had bone pain prior to diagnosis so....

Hopefully, it will be the same for you.

dlittkemann, tumor flare is a real phenomenon. I've never experienced it myself, but there is some literature on it.

Tumor flare is when the tumor grows as you start therapy then dies off. Usually accompanied by increased bone pain.

me too, when I started Ibrance-Femara I had worrisome sharp new pains in my shoulder and hip, right where some of the largest tumors were. But they eventually went away completely..

I can tell you that we figured where one of my random pains was coming from. My liver was swollen! They gave me steroids to lower the inflammation and lo! the pain that I thought was from my ribs was gone.

So sometimes the cause isn't the cause. I hope yours start feeling better soon.