Rubefacient

A rubefacient is a substance for external application that produces redness of the skin e.g. by causing dilation of the capillaries and an increase in blood circulation.

Common herbal rubefacients include:
 * Cayenne (Capsicum minimum)
 * Cloves (Eugenia caryphyllus)
 * Garlic (Allium sativum)
 * Ginger (Zingiber officinale)
 * Horseradish (Cochlearia armoracia)
 * Mustard (Brassica alba or B. nigra)
 * Nettle (Urtica dioica)
 * Rosemary Oil (Rosmarinus officinalis)
 * Rue (Ruta graveolens)
 * Wintergreen Oil (Methyl Salicylate)