Blister on 14 month-old's gums

My son is 14 months-old. He is getting all of his teeth in at once. I noticed a blister on his gums. Are blisters normally present during teething?


There are several conditions associated with erupting teeth. These conditions can include a slight swelling in the area of eruption, a skin flushing around the adjacent cheek, and a painless bluish swelling (i.e. eruption hematoma) in the area of eruption. Cyst formation is also possible.

It sounds as if your son might have had a small cyst in his gums. This is not uncommon in teething children. In fact, some reports state that 70-80% of babies have small cysts in their mouth, usually located either in the midpalate area or in the ridges where the teeth erupt. These cysts are most likely caused by remnants of tissue involved in tooth formation and develop as an accumulation of fluid between the tooth and the overlying tissue. The cysts can appear as raised white or skin-colored nodules. They may be as large as 3mm in diameter. They can be singular or multiple.

The technical term for a cyst which expands through the bone to cause a soft swelling over the erupting tooth is an "eruption cyst". This can be distinguished from the above-mentioned eruption hematoma because it is filled with clear fluid rather than blood. Generally, these cysts will resolve on their own and require no treatment. Once they burst, normal eruption of the teeth usually follows. In a small number of cases, the cyst does not resolve spontaneously or can cause discomfort. If this is the case, the cyst should be removed to resolve the discomfort and aid in tooth eruption.

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