Does Kidney Cancer Cause Back Pain?

Yes, kidney cancer can cause back pain, but usually not in the early stages. When back pain does occur, it is often a sign that the tumor has grown larger or is pressing against nearby tissues. The pain is usually felt in the lower back or side (flank), just below the ribs, and it often affects only one side of the body.

This type of pain may be dull and persistent, rather than sharp or cramping. It does not always go away with rest and may gradually worsen over time. Unlike muscle strain or common back injuries, pain from kidney cancer is not usually related to movement or posture.

In some cases, the pain is accompanied by other symptoms, such as:

  • Blood in the urine
  • A lump or swelling in the side or abdomen
  • Unexplained fatigue or weight loss

Back pain caused by kidney cancer may also signal that the cancer has spread beyond the kidney, especially if the pain is severe or occurs along with symptoms like bone pain or shortness of breath.

However, it is important to remember that back pain is very common and is usually due to other causes like muscle strain, spinal problems, or kidney stones—not cancer. But if the pain is persistent, worsening, or combined with other warning signs, it is best to consult a doctor. Imaging tests such as ultrasound or CT scan may be needed to rule out serious conditions, including kidney cancer.

Early detection leads to better outcomes, so unexplained back pain should not be ignored—especially if it’s one-sided and doesn’t improve.

Looking for more questions?

Visit our Kidney Cancer Questions page for all other topics explained in plain language.

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