How does baby often mouth ulcer return a responsibility

If your baby often shows oral ulcers, it may be caused by a lack of vitamin b1, or b2, or b6, or b12, or it may be caused by a lack of trace element iron, a lack of trace element zinc, or it may be caused by low immunity. Of course, it may also be purely inherited. If parents are prone to repeated oral ulcers, the baby may also get such ulcers. Generally speaking, it is recommended to supplement nutrition for small babies, eat more fresh vegetables, eat more fresh fruits, and eat light diet.