What are the cure of crushed egg shells?

It seems you're asking about a misunderstanding. There's no medical condition or "cure" related to crushed egg shells.

Perhaps you're thinking of something else?

Here are some possibilities:

* Egg shell fragments in food: If you accidentally eat a small piece of egg shell, it's usually harmless and will pass through your digestive system.

* Egg shell powder as a supplement: Some people take crushed egg shell powder as a calcium supplement, but it's not a standard medical recommendation.

* Egg shell allergy: Some people are allergic to eggs and can have reactions to the proteins in the egg white and yolk.

If you're concerned about something specific, please provide more information about what you are asking.