By the very history it looks like angioneurotic edema
which a form of allergic reaction
This type of allergic reaction is a cause for concern.
Most of the times this type of reaction is related to food allergy
It is strongly advised to avoid any allergen which is suspected to cause the allergy.
Due to edema of the tongue it may fall back and obstruct the airway.
Keep her under constant observation.
Sleep on her sides to avoid tongue falling back and obstructing the airway.