Kidney cancer is one of the most common cancers in the UK, according to the NHS.
The cancer usually affects people in the 60s and 70s, and it’s rare in anyone under 50.
Symptoms of kidney cancer are difficult to spot, and may only be picked up during routine tests.
But, having a pain in your side that won’t go away could be a sign that you need to see your GP.
“Maybe you’ve had kidney cancer symptoms such as pain in your side, weight loss, or extreme fatigue,” said medical website WebMD.
“Or maybe your doctor has found a lump in your side during a routine exam or a sign of kidney cancer during a test for another disease.
“Regardless, to confirm a diagnosis of kidney cancer, you will need a thorough physical exam, health history, and tests.
“Your doctor will feel your abdomen and side for lumps and check for fever and high blood pressure, among other things.”
Finding blood in your urine is also a symptom of kidney cancer.
The blood may not be obvious, but if your urine is darker than normal, it may be tinted with blood.
A lump or swelling in your side could be a sign of the disease.
But, kidney cancer is usually too small to feel, so a lump is unlikely to be cancerous.
The exact cause of kidney cancer is unknown, the NHS said.
But, the risk of developing the disease increases if you’re overweight, have high blood pressure, or have a family history of kidney cancer.
More than 12,000 people are diagnosed with kidney cancer every year in the UK.
There’s been an 85 per cent rise in the number of cases since the early 1990s, said Cancer Research UK.