Last year, seven people died every day from the illness which affected a whooping 8,337 patients in Britain.
The findings were reported by the Oral Health Foundation charity, which is urging people to understand the causes of the “devastating” disease.
They also claimed the cancer was brought on by smoking, alcohol and oral sex while contracting sexually transmitted virus HPV.
Dr Nigel Carter OBE, chief executive of the charity, said: “While most cancers are on the decrease, cases of mouth cancer continue to rise at an alarming rate.
“Traditional causes like smoking and drinking alcohol to excess are quickly being caught by emerging risk factors like the human papillomavirus (HPV)…
“We have seen first-hand the devastating affect mouth cancer can have on a person’s life.
“It changes how somebody speaks, it makes eating and drinking more difficult, and often changes a person’s physical appearance.”
The report found that HPV – a common virus which spreads through sexual activity – causes 73% of oropharyngeal mouth cancers.
Alcohol causes around a third of all cases, with those who drink more than 10 units each week increasing their risk by 81%.
Smoking is the culprit of 17% of oral cancers and smokers increase their chance by a whopping 91%.
Meanwhile, old age is also highlighted as a factor, as are lesser causes such as X-rays, gamma radiation, asbestos, salted fish, formaldehyde, wood dust, over exposure to sunlight, environmental smoke.
Depending on where the cancer strikes, the one-year survival rate for mouth cancer is between 60% and 83%.
Symptoms of mouth cancer include unexplained persistent lumps, white or red patches on the lining of the mouth or tongue and changes in speech.
The NHS recommends seeing your GP or dentist if you’re worried about the condition, particularly if you drink or smoke heavily.
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