Blisters on the tongue in children may be caused by bacterial or viral infections, or by fire. A common cause of tongue blisters in children is local infection. There are many filiform papillae on the tongue, and if there is poor oral hygiene or bacterial infection in the saliva, it can easily lead to filiform papillitis and small blisters can appear. This condition can be gargled with a mouthwash that has antibacterial and anti-inflammatory properties. It can also be caused by herpes simplex virus infection, which is mostly seen in herpes stomatitis, where small pinpoint clusters of blisters appear on the oral mucosa or tongue, which can break down and form crusts, sometimes with significant pain, and this condition can be treated with oral antiviral oral solution. Blistering of the tongue in children can sometimes be caused by involuntary tongue biting, a traumatic factor that requires a change in bad habits. Blisters on a child’s tongue can also be caused by fire, eating spicy foods that can easily cause blisters, or vitamin deficiencies and poor digestion of the gastrointestinal tract, leading to malnutrition and blisters. Sometimes it is also related to the child’s low resistance, you can take oral plate blue root or honeysuckle tea and so on. So a child’s blistered tongue may be caused by a bacterial or herpes simplex virus infection caused by a low immune system, or it may be caused by fire and malnutrition.