Mouth sores may be a side effect of chemotherapy and radiation. They can make it difficult to eat, drink, and swallow. You can relieve the pain with things like ice chips, Magic Mouthwash, numbing ...

Your toddler may have a rash that just looks like acne. Perioral dermatitis causes a red, bumpy rash around the mouth. It can sometimes spread to around the nose and even the cheeks and eyes.