IC/painful bladder linked to overactive bladder?

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This is an interesting study that posits a link between OAB and IC

Mechanisms Underlying Overactive Bladder and Interstitial Cystitis/Painful Bladder Syndrome.

Whilst considered to be separate pathological entities, there is now significant clinical and pre-clinical evidence that both OAB and IC/PBS are related to structural, synaptic, or intrinsic changes in the complex signaling pathways that mediate bladder sensation.

https://pubmed.ncbi.nlm.nih.gov/30618560

Full paper https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6299241/

Worthwhile watching this video: