Strawberries rash reactions on kids

My daughter woke up this morning with a pretty bad rash on one side of her face, her neck and back. The only food she had yesterday who could have gave her this is most likely strawberries.

She did has it once but it wasn't as bad as today. Any experience here on if it is going to pass or is it a food we have to cross from her diet? She doesn't have any allergies that we know of and she loves strawberries.

Thanks

Nil