Cancer is a deadly disease that’s caused by cells reproducing uncontrollably.
These ‘cancerous’ cells can destroy the surrounding healthy tissue, including organs.
More than a third of people will develop cancer at some point in their lifetime.
Having a persistent blocked nose could be an early warning sign of nasal and sinus cancer.
Nasal and sinus cancer is a rare type of cancer that affects the area behind the nose, and the air-filled cavities inside the nose, said the NHS.
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One of the most common signs of the cancer is a persistent blocked nose, that usually affects only one nostril.
Speak to a doctor if you have a persistent blocked nose. It’s probably nothing serious, but it’s still worth getting checked, it said.
“[Nasal and sinus cancer is] a rare type of cancer that most often affects men aged over 40,” said the NHS.
“The most common symptoms of nasal and sinus cancer are a persistent blocked nose, which usually only affects one side, nosebleeds, and a decreased sense of smell.
“These symptoms can be similar to more common and less serious conditions, such as a cold or sinusitis.
“See your GP if you notice any unusual or persistent symptoms.
“It’s very unlikely they’ll be caused by nasal or sinus cancer, but it’s worth getting them checked out.”
Other warning signs of the cancer include having a persistent runny nose, and having mucus drain into the back of your throat.
As the cancer progresses, it could also cause a pain in the face – particularly in the upper cheek – or swollen neck glands.
Your doctor may suggest you have further tests if they’re worried nasal and sinus cancer.
The cancer may be diagnosed by a nasal endoscopy, where a long-thin tube is inserted into the nose.
Those most at risk of developing nasal and sinus cancer include smokers, and people with the human papilloma virus (HPV).
Around 460 people are diagnosed with nasal and sinus cancer every year in the UK.
More than 70 per cent of patients survive for at least one year after their diagnosis.
About half survive for more than five years, added the NHS.