I had a corn snake that ended up with similar wounds due to a bad skin infection. She had open sores and needed injected antibiotics to get better.

Anyway once her open sores healed up she shed. After the shed the places looked very similar to that snakes/ I think it's part of the healing process. Keep everything VERY clean and make sure she is getting enough water. When they have open sores like that they can dehydrate quickly.

My girls ended up making a full recovery, she just has some scars.