Oak bark (Quercus robur), is also known as white oak which comes from the bark of a tree in the Fagaceae family. The bark from the oak tree is the only part used medicinally and is harvested from March to April. White oak bark is used as a tea for arthritis, diarrhea, colds, fever, cough, and bronchitis; for stimulating appetite; and for improving digestion.
- Pharyngitis (sore throat)
- Mouth sores and bleeding gums
- Colds, coughs, and bronchitis
- Fever
- Pain and inflammation
The properties of oak bark include:
- Anodyne: A substance with painkilling properties
- Astringent: A property that causes the constriction of cells and body tissues to help treat abrasions, bleeding, and other conditions
- Depurative: Herbs that are considered to have purifying and detoxifying effects
- Emmenagogue: A substance that stimulates or increases menstrual flow
- Styptic: A substance capable of stopping bleeding when applied to a wound (commonly used in styptic pencils)
The high concentration of tannins in oak bark is thought to promote very strong astringent properties. White oak bark has been considered for treating the following:
- Eczema
- Skin irritation
- Itchy patches of skin
- Inflamed skin
- Hemorrhoids
- Infected wounds
- Staph infections
- Bleeding cuts or wounds
- Herpes zoster (shingles) lesions
-
Pregnancy or breastfeeding: There is not enough medical research available to know whether oak bark is safe for pregnant women or babies who are breastfeeding. Cardiac (heart) conditions: Those who have heart conditions should not use oak bark. Skin conditions or burns with large areas of broken or damaged skin: Those with open, weeping areas of the skin should not take oak bark baths. Hypertonia: This is a nerve condition that causes the muscles to tighten. Those with hypertonia should not take oak bark. Kidney or liver conditions: Oak bark may worsen kidney and liver problems, particularly when used over a long time span. Gastrointestinal (stomach and intestine) problems: The high concentration of tannins in oak bark (8% to 10%) could cause gastrointestinal disturbances in some people.