A 12-year-old male presents with a two-year history of altered appearance of the dorsal tongue, with occasional ‘blood blisters’.

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<p>A 12-year-old male presents with a two-year history of altered appearance of the dorsal tongue, with occasional 'blood blisters'.</p><p>The area is not painful and does not interfere with speech, swallowing or eating.</p><p>He has no significant past medical history and appears fit and well.</p><p>Oral examination reveals multiple clear vesicular-like lesions, measuring 1-2 mm in diameter — with a few areas appearing blood filled, involving the mid-dorsal surface of the tongue.</p><p>The tongue is soft, although somewhat enlarged in this area.</p>

Dr Jacinta Vu is an oral medicine specialist and clinical senior lecturer at the University of WA Dental School, who practises in Perth, WA.