Dandruff in young children is very rare. Most often what you think is dandruff is something else.
Dandruff is caused by an overgrowth of a fungus on the scalp that causes the skin to rapidly shed. Normally dandruff will occur at the time a child reaches puberty and can last a lifetime.
When a toddler appears to have dandruff, there are number of considerations
If your child has recently had sunburn his scalp may be flaking as a result.
If shampoo and other hair products are not rinsed out properly, they will build up and flake to resemble dandruff.
There are several skin conditions that can cause the scalp to become flaky; seborrheic dermatitis, eczema, or psoriasis to name a few.
If you notice any hair loss in addition to the flakiness, check to see if there is a swollen gland. Your child could have ringworm.
If your child shows signs of what appear to be dandruff and you are not sure what else it could be, it’s probably a good idea to take them to the doctor for proper treatment.