'One of the most important' symptoms of mouth cancer named as warning issued over festive drinking

Even moderate but regular drinking can quietly harm the delicate tissue inside your mouth, making it more susceptible to cancerous changes.

"A persistent sore, a rough patch, or a small red or white area that lingers after the holidays is one of the most important signs to get checked," Dr Bozic explained.

He describes alcohol as one of the "most overlooked" causes of oral cancer because the damage happens gradually and without pain.

"Alcohol dries out and irritates the mouth's soft tissues," he said. "When the lining becomes weakened, it's far easier for carcinogens - especially from smoking or vaping - to penetrate and cause long-term damage."

Alcohol does more than just dry things out – it also reduces saliva, which normally protects your mouth, and breaks down into acetaldehyde, a toxic substance that harms cells.

For those who smoke or vape while drinking, the danger increases dramatically. Dr Bozic warned that the combined risk becomes "multiplicative, not additive".

"Alcohol acts like a solvent," he explained. "It helps carcinogens from tobacco or even burnt food penetrate deeper into the tissue."

People often brush off mouth issues, blaming a sharp crisp or accidentally biting their cheek – but Dr Bozic says anything that doesn't heal within a fortnight should never be ignored.

Beyond non-healing sores, there are several other symptoms worth taking seriously.

Anyone noticing a lump, patch or ulcer lasting more than 14 days should seek a dental or medical check-up.

The same goes for persistent soreness or a burning sensation in the mouth.

A lump appearing in the neck or beneath the jaw is another red flag, as is any difficulty swallowing.

Unexplained bleeding in the mouth also warrants professional attention – it's always better to get these things checked out.

So how can you stay safe this festive season?

Dr Bozic recommends keeping alcohol intake in check and making sure you stay well hydrated throughout the celebrations.

He also advises steering clear of cigarettes when you're drinking – the combination is particularly harmful.

Booking regular dental appointments is another smart move, as dentists can spot early changes that you might miss yourself.

"Most Christmas mouth issues are harmless," Dr Bozic reassured. "But cancer often starts quietly. If something doesn't heal - get it checked. Early detection is what saves lives."

While the doctor encourages every to enjoy the festivities, he advises keeping an eye on any changes in your mouth that stick around longer than they should.