Probiotics are a cheap and low-risk. If you have any general inflammation type issues that don't seem to have a cause, it might be worthwhile to just try probiotics.
My Dr. told me to try them for a digestive issue - and they sort of helped that.
But a handful of other things unexpectedly improved. Acid reflux went from really bad to barely noticeable, and my skin really cleared up. I had red, flaky skin on my face for 20 years and suddenly it's gone within 48 hours of starting probiotics.
Yeah... post hoc ergo propter hoc, but it's a cheap and harmless shot in the dark.
Worst case scenario, it doesn't work and you're out $10.
Edited to say "low risk" instead of "risk free".