Children in pain often worry about the parents worrying about them. We parents may hover or fuss or talk over their heads or around them without including the child. I think it's important to involved the child at their developmentally appropriate level in their own well-being. The New York State Nurses Association made recommendations about nurses incorporating therapies into their practice. I'll provide some brief information about using a few more therapies.
Aromatherapy is a good tool if a child has a history of enjoying smells.
For example, my daughter would be a candidate because of how she currently responds to aromas, but my son finds almost any scent too strong. The olfactory nerve is impacted when the aroma is released or is sometimes applied to the skin. This impacts emotions and hormonal responses. Hypnosis is another useful technique if a longer term pain issue or stress issue is present. Children from elementary school age on up can successfully learn self-hypnosis.