Hello Patty,
I can't help but put on my Nurse's cap for this one, at least initially. This child appears to have some chronic sinus issues that need to be addressed either by allopathic or naturopathic means. Can you encourage Mom to do so?
As for tapping, going directly for the physical symptoms can be helpful in the short term. For the long term, I am sure with divorcing parents, this child is most distressed. If you do not want to interfere with the Mother's beliefs or non beliefs, perhaps, you can show this little girl a short cut that emphasizes the positive feelings.
For example, have her think of a time or event that made her feel very happy and have her bring up those feelings as vividly as possible. Then do a round of tapping for the good or happy feelings.
Karate Chop X 3..."Everytime I think about ...(the happy specific event)...I get this happy feeling inside that makes me feel good/happy/better."
EB...This happy time"
SE..."Just thinking about it makes me feel good/happy/better"
UE..."I like this feeling"
UN..." I choose this feeling over feeling ________"
CH..."I am in charge of my feelings"
CB..."I can feel this way anytime I want"
UA..,"I laugh and smile at the thought of..."
CR (Crown of Head)..."I can tap myself happy any time I choose"
After she has sufficiently anchored those good feelings, tell her she can bring them back simply by tapping her favorite (or most discrete) point. You might suggest the Under Arm as I have found that the "Tickle Spot" always evokes a chuckle.
You can continue your surrogate tappingfor what you believe are her most distressing issues. Simply tap yourself as if you are the child. Begin with statement, "I am tapping for Child's Name with the intention of helping her feel..." Be persistent.
You are a good friend.