A 5-year-old boy is on treatment for ALL. He is in the maintenance phase of his treatment and he has a normal neutrophil count. You see him in clinic every week to monitor his treatment. He presents in clinic and his mum says that he has "tingling" in his mouth and it hurts him when he eats crisps or other salty food. You examine him and you find multiple small red lesions in his buccal mucosa and on the roof of his mouth. There is no white coating of his tongue, nothing on his lips or on his face and the rest of his body. His physical examination is otherwise normal. His observations are all within normal range and he is apyrexial.What would be your management plan?