It is a common practice to consume betel leaves along with edible lime and betel nuts after a meal for better digestion. In addition, the properties of betel leaves is used as a remedy for cough, common cold and certain respiratory disorders. This DIY shows how to use betel leaf as a remedy for headache.
https://www.youtube.com/watch?v=NIXbmFGuPEo
Betel leaf remedy to cure headaches - DIY
Betel leaves and camphor can both reduce headache and common cold.
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