Hello,
Thanks for the query to H.C.M. Forum.
Since child was only 6 years hence he was not able to explain proper nature of disorder and he complaints that he is feeling pain in the neck.
As neck having many joints and child was complaining about these joints pain.
Pain is also in the shoulder joint with swelling.
In
rheumatoid arthritis there is pain in small joint at first stage and this pain subsides within a short period.
After some time it involves larger joints as it involved shoulder joint.
Now please get in blood examination for Rheumatoid arthritis factor( R. A. factor).
Since this is a bacterial disease so E S R is also important.
So please consult a physician and get treatment accordingly.
Hope I have answered your query.
If any further question I will be happy to help.
Wish you a good luck for your child.
Dr. HET