In some instances, the skin is entirely dead, and the flesh underneath the patch will have gone brown as well. It makes the fruit unsellable.
Growers still (as of 2006) don’t have an exact idea of what causes it to occur or not occur.
It hits pears and apples, but mostly apples. Apples that are particularly susceptible to scald include Cortland, Granny Smith, McIntosh, Red Delicious, Rome Beauty, Stayman and Turley.
Scald occurs during or after storage.