Allergies can be caused by several things,among them the food you consume.
Allergies on the mark with the onset of rash and itch.
If you have allergies you can treat it by preparing the materials as below:
Material:

Betel leaf :6 grams
Bangle :1 piece
Eucalyptus oil :1 tablespoon

Method:
Betel leaves and bangle destroyed until smooth and then mixed with eucalyptus oil and stir until mixed.

How to use:
Potions in dab on skin itch.
The first reaction of the skin feels hot, but so be it because of the itching will soon recover.