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A mouth ulcer typically takes about 10-14 days to heal. Dr Chelsia Sim - Director, Education, Senior Consultant, Department of Oral & Maxillofacial Surgery appeared on Channel 5's Let's Talk About Health programme to provide her expertise on the topic of mouth ulcers. 

Watch the programme here and learn why you should not ignore mouth ulcers if it stays recurrent or persistent for more than three weeks.