What Is The Periwinkle Plant Used For?

What Is The Periwinkle Plant Used For? Periwinkle is also used for treating diarrhea, vaginal discharge, throat ailments, tonsillitis, chest pain, high blood pressure, sore throat, intestinal pain and swelling (inflammation), toothache, and water retention (edema). What is periwinkle herb good for? Periwinkle is an astringent herb that can be used as a mouth rinse