Hi - I really feel for what you are going through. We are going through a bad flare up with our 10yo son too at the moment & were wondering exactly the same thing (re how long would it be ok to treat with anti-inflammatories?). Thank u so much for posting!
You probably already have this info but I came across a journal of child and adolescents psychopharmacology (Volume 27, issue 7) that researched the level of impact that anti-inflammatories have on flare up time. They demonstrated that it can shorten the average 12week flare up period by about 4 weeks by using anti-inflammatories. We’ve been using Advil, but this morning our son’s Dr swapped us to Naproxen 250mg x 2/day as well as continuation of Augmentin Duo 5mls/day. Within an hour of taking the Anti-inflammatories our son went from severe panic attacks & OCD etc.... to normal. Unbelievable! All the best with it all (I’m new on here so I hope this info posts 🙂). Cheers, Cath