Therapeutic Effects of Evodiae Fructus Applied to the Soles of the Feet

Core Therapeutic Effects

Warms the Spleen and tonifies the Kidneys; exerts antibacterial effects; regulates the nervous system; dispels cold and alleviates pain.

Introduction

Evodia Fruit (Wu Zhu Yu) belongs to the category of “warming interior” herbs in Traditional Chinese Medicine (TCM). It is primarily used to dispel cold and relieve pain, suppress upward-rebellious Qi to stop vomiting, and warm Yang to arrest diarrhea. Clinically, it is commonly prescribed for conditions such as cold-induced pain, cold-stagnation in the stomach causing nausea and vomiting, and diarrhea due to deficiency-cold of the Spleen and Kidneys.

Therapeutic Effects of Applying Evodia Fruit to the Soles of the Feet

1. Warming the Spleen and Tonifying the Kidneys

Evodia Fruit is acrid and hot in nature, enabling it to warm the Spleen and tonify the Kidneys, strengthen Yang, and arrest diarrhea. It is a commonly used herb for treating diarrhea occurring at dawn (“five-o’clock diarrhea”) due to Yang deficiency of the Spleen and Kidneys. It is frequently combined with Psoralea Fruit (Bu Gu Zhi), Nutmeg (Rou Dou Kou), and Schisandra Fruit (Wu Wei Zi), as exemplified in the classic formula Si Shen Wan (Four Gods Pill).

2. Antibacterial Activity

The ethanol extract of Evodia Fruit demonstrates marked anthelmintic activity against Ascaris lumbricoides (roundworms). Its decoction exhibits potent inhibitory effects against Vibrio cholerae in experimental studies. Furthermore, its aqueous extract shows varying degrees of antifungal activity against 11 dermatophyte species, including Microsporum audouinii and Trichophyton mentagrophytes.

3. Regulation of the Nervous System

Evodia Fruit exerts excitatory effects on the central nervous system and increases carotid arterial blood flow. Its ethanol extract possesses analgesic properties, while certain alkaloids isolated from Evodia Fruit exhibit sedative and sleep-promoting effects.

4. Dispelling Cold and Alleviating Pain

Due to its acrid-dispersing and bitter-draining properties, coupled with its hot nature, Evodia Fruit effectively dispels cold and relieves pain. It also soothes the Liver, resolves stagnation, suppresses rebellious Qi to stop vomiting, and concurrently neutralizes excess stomach acid to alleviate pain.

Contraindications and Precautions for Evodia Fruit Use

1. Although Evodia Fruit possesses numerous therapeutic benefits, it is not suitable for everyone. Individuals with Yin deficiency and hyperactive Fire—such as those experiencing symptoms like Qi stagnation, Fire agitation, blurred vision, or skin eruptions—should avoid its use. As noted in the *Compendium of Materia Medica* (*Ben Cao Gang Mu*), it is also contraindicated in individuals with weak Spleen and Stomach function or those suffering from summer-heat syndrome.

2. *Collected Commentaries on the Classic of Materia Medica* (*Ben Cao Jing Ji Zhu*): “Polygonum fruit (Liao Shi) serves as a synergist. Evodia Fruit antagonizes Salvia miltiorrhiza (Dan Shen), potassium nitrate (Xiao Shi), and white clay (Bai E); it is incompatible with purple quartz (Zi Shi Ying).”

3. *Essential Readings of Materia Medica* (*Ben Cao Meng Quan*): “Particularly contraindicated in cases of chronic diarrhea due to intestinal deficiency.”

4. *Compendium of Materia Medica* (*Ben Cao Gang Mu*): “May cause Qi stagnation, Fire agitation, blurred vision, and skin eruptions.”

Appropriate Population

Individuals presenting with cold-type abdominal or epigastric pain, headache, or diarrhea caused by cold in the Liver and Stomach.

Contraindicated Population

Individuals with Yin deficiency and internal heat, or those experiencing diarrhea due to deficiency-cold.

Foods and Herbs to Avoid Concurrently

Salvia miltiorrhiza (Dan Shen), potassium nitrate (Xiao Shi), white clay (Bai E), and purple quartz (Zi Shi Ying)

The above outlines the therapeutic effects of applying Evodia Fruit to the soles of the feet. We hope this information proves helpful.