what causes the trees to shed their bark

Question

Bark is shedding off the trees. Like losing their skin.

Answer 1

What type of tree are you referencing?

This can be a naturally occurring event or signs of disease.

Here are a few article for you.

https://www.gardeningknowhow.com/ornamental/trees/tgen/exfoliating-bark-trees.htm
https://www.gardeningknowhow.com/ornamental/trees/tgen/peeling-bark-on-trees.htm