Why Toddlers Get Mouth Sores
Unfortunately, toddlers are just as susceptible to mouth sores as adults. Canker sores, the most common type, can be caused by stress, lack of rest and immune disorders, though experts aren't sure exactly why they occur.
Cold sores spring up both inside and outside the mouth. They typically appear around your child's lips and the skin around their mouth. But upon a first outbreak, they can also appear inside the mouth.
Cold sores are a form of herpes simplex virus type 1, a contagious virus passed through contact. In children, cold sores are usually caused by transmission from an adult. So, hard as it may be to avoid cuddling your tot, be aware that if you think you have the virus, it's best to refrain from that goodnight kiss when a sore is present. Likewise, speak to your doctor about breastfeeding if you think you've had an outbreak.
HFMD is similarly transmitted through a virus known as the coxsackievirus. Coxsackievirus occurs most commonly in children. It is passed through bodily fluids, direct contact or fecal matter, according to the Centers for Disease Control and Prevention. HFMD is a minor ailment and should subside within a week.
Since cold sores and HFMD are very contagious, you'll want to avoid direct contact with anyone who has active ulcers.
Injuries to the mouth are a common result of toddler activities. Brushing too hard can be one cause. A burn may be another if, for example, your toddler can't wait to dive into that plate of hot pasta.