It seems extremely common as people age. Your body just starts to break down as we get older and this is one, amongst many, ways that this manifests. A quick search suggests it shows up in about 50% of people over 70. [1]

[1] - https://pmc.ncbi.nlm.nih.gov/articles/PMC11879357/

Lot of these are a spectrum. 3 to 5% might have a mild form that's aggravated by super spicy food or something but otherwise not very noticeable.

And then maybe a percentage of those people have a more debilitating version ?