If your child is suffering from hair loss and hair problems due to cancer treatment or other reasons, always seek medical advice, and if needed, psychological support.
More and more children are suffering from hair loss these days, and fortunately there are projects/institutions/groups/associations which provide support and more information.
For your local support organizations, consult with your GP or pediatrician. It is a good choice to connect with other families and children who are suffering from the same illnesses.
Some of the websites and projects that support children who experience hair loss are:
AAD Kids Connection