A Melbourne woman claims she spent Sunday night in hospital after biting into a strawberry containing a pin and another mystery object which she believes may still be lodged somewhere inside her.

Skye Wilson said she bit into something hard inside a strawberry that had been bought by a friend from the Coles store in Eltham and intended for a birthday cake.

Skye Wilson claims she bit into this pin inside a strawberry purchased from Coles' Eltham store.

Initially, she thought it was part of the strawberry's stem or foliage.

"I pulled it out of my mouth and it turned out to be a pin," she said.