Signs and symptoms of kidney cancer

Small kidney cancers don’t usually cause symptoms. They are often diagnosed by chance. For example, when people are having tests or scans for some other reason.

When kidney cancer does cause symptoms these may include:

  • blood in the urine (this is the most common symptom)
  • a dull pain in your side between your upper abdomen and back
  • a high temperature, night sweats and feeling very tired
  • losing weight for no obvious reason
  • a lump in the tummy area, side or back.

Most people with these symptoms won’t have kidney cancer. They can be caused by more common conditions. But, if you have any symptoms, it’s important to get them checked by your doctor.

Back to Understanding kidney cancer

What is cancer?

There are more than 200 different kinds of cancer, each with its own name and treatment.

About kidney cancer

About 90% of kidney cancers (9 out of 10) are renal cell cancers. Renal cancer usually only affects one kidney.

The kidneys

Most people have two kidneys. They filter the blood and remove waste products.

Why do cancers come back?

Sometimes, tiny cancer cells are left behind after cancer treatment. These can divide to form a new tumour.