Your son's mouth ulcers are not aphthous ulcers but are caused by a herpes virus infection. This condition is known as 'herpes stomatitis'. The sores are very painful and children find it difficult to eat or drink. Apply Teejel gel to the sores at least twice a day. The sores take about 10 days to heal.If he refuses to drink he runs the risk of becoming dehydrated and will need to be seen again by his doctor.
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