If I suddenly couldn’t feel pain?

Pain has a purpose.

Pain is necessary.

How would you know if you'd injured yourself?

How would you know if you were at risk?

Know you were ill?

Know you'd pushed yourself too far?

Know you needed help?

I devoured fantasy fiction as a teen into my twenties and one of those series was the Chronicles of Thomas Covenant. A leper in modern times who finds himself transported to a magical world where he gets cured every time he visits but while on earth he has to constantly perform a ritual visual check on himself for injuries. A "visual surveilance of extremities."

The disease does just that, it kills your sensory nerves meaning you can't feel pain and that leads to very nasty injuries, infections and complications.

If I was incapable of feeling pain I'd be damned careful until I was cured and got it back...