Step one:
Validate.
Validating their emotional experience will have a calming effect for your child. We recommend using the word "because" as a way of demonstrating your efforts to understand their experience. For example, "I can imagine that you might not want to eat this because you don’t feel very hungry, and because it may feel too much, and because it might be different from what your friends are having."
It helps reduce the intensity of their thoughts and feelings when the external environment (you) matches their internal experience (their thoughts and feelings).
We are often pulled to offer reassurance or solutions, these are more effective AFTER first validating!
Step two:
A - Emotional support. This includes, comfort (e.g. a hug), reassurance (e.g. "it’s going to be ok"), hope (e.g. "I know we can get through this"), belief in your child (e.g. "I can see how hard you’re trying"), togetherness (e.g. "I’m here for you").
B - Practical support. It’s helpful to be specific and to give two suggestions in keeping with what you were validating. These can include distraction, redirection, exposure, setting limits and taking control where appropriate.