@GracieGirl,
If you're interested, I've had cancer, too. So has my husband. (Both about 17 or 18 years ago, so don't worry.) Neither of us had any pain whatsoever from the cancer. The treatment, however...
My husband had a lump under his jawline that they thought was due to an enlarged lymph node from a respiratory infection. Two rounds of antibiotics, and it didn't go away. So they decided it must be a cyst (they're common in that area) and tried to remove it. Uh oh, it wasn't a cyst. Turned out to be stage 3 tonsillar cancer that had spread to the nearest lymph node. (Yes, cancer can start in a tonsil. Cancer can start damn near anywhere.) They gave him a 50-50 chance of surviving 3 years. A very risky and disfiguring surgery followed, as did intensive radiation treatment that was very difficult. All this happened when I was pregnant with our only child and during the baby's first few months. Hubby is still here and doing fine, although he will be on pain meds for the rest of his life as a result of the surgery. The cost of being alive.
A year later, I had an enlarged thyroid (called a "goiter") which is not that uncommon, especially in the first year after a pregnancy. The enlargement was benign, as they usually are. But unexpectedly, lab results after the surgery showed cancer beginning. So I had a second surgery to remove the remaining thyroid and follow-up "nuclear medicine" that was a breeze. I just swallowed a radioactive iodine pellet and stayed in isolation for a few days, reading a good book. Didn't even have to change out of street clothes. A follow-up scan showed not a single thyroid cell left in my body, and since the form of cancer I had only originates in thyroid cells, it was a 100% cure. However, I will have to take replacement thyroid hormone every day for the rest of my life and have blood tests to monitor it every 3 months. That's pretty easy, though.
Oh, another example. My husband's aunt has lung cancer right now, and was just given 6 weeks to 6 months to live. It was suspected by symptoms and confirmed by x-rays and other tests. She has had no pain so far, and they say she may not have any. I hope they're right.
Why do you ask? Do you know someone who has cancer now?