About This Herb*
Traditional Chinese Medicine background and properties
Herb Description*
Mulberry twig is a gentle, commonly used herb that helps relieve joint pain, stiffness, and swelling caused by Wind and Dampness lodging in the body. It has a special affinity for the shoulders and upper limbs. It is also used to reduce water retention and support circulation to the extremities.
Herb Category*
Main Actions*
- Dispels Wind-Dampness
- Benefits the joints
- Unblocks the Channels and Collaterals
- Promotes Urination and Reduces Edema
How These Actions Work*
'Dispels Wind-Dampness' means Sang Zhi helps clear out the pathogenic Wind and Dampness that lodge in the muscles, joints, and channels, causing pain and stiffness. This is the herb's primary action and applies to the various forms of painful obstruction syndrome (bi zheng) where joints ache, swell, or feel heavy. Because twigs are shaped like limbs and extend outward, classical theory holds that Sang Zhi has a natural affinity for the extremities, especially the upper limbs and shoulders.
'Benefits the joints' means Sang Zhi specifically eases joint stiffness, soreness, and restricted movement. It is particularly valued for shoulder and arm pain, where it is considered one of the most effective guiding herbs, directing the formula's effects to the upper body.
'Unblocks the channels and collaterals' means Sang Zhi opens the network of channels through which Qi and Blood flow. When Wind-Dampness obstructs these pathways, numbness, tingling, spasm, and even paralysis can result. Sang Zhi's ability to open these channels makes it useful not only for rheumatic conditions but also for post-stroke limb dysfunction (hemiplegia).
'Promotes urination and reduces edema' refers to Sang Zhi's ability to regulate water metabolism and help the body drain excess fluid. This is why classical texts mention it for conditions like swollen legs (leg Qi or 'jiao qi') and generalized edema.
Patterns Addressed*
In TCM, symptoms cluster into recognizable patterns of disharmony that reveal what's out of balance in the body. Sang Zhi is traditionally associated with these specific patterns.
The following describes this herb's classification within Traditional Chinese Medicine theory and is provided for educational purposes only.
Why Sang Zhi addresses this pattern
Wind-Damp Painful Obstruction (Wind-Damp Bi) arises when Wind and Dampness invade the channels and joints, obstructing the flow of Qi and Blood. Sang Zhi is bitter and neutral, entering the Liver channel which governs the sinews. Its core actions of dispelling Wind-Dampness and unblocking the channels directly address the pathomechanism of this pattern. Its twig form gives it a natural tendency to reach the extremities and joints. It is particularly effective when the obstruction manifests in the upper limbs and shoulders, making it a first-choice herb for upper-body bi pain.
A practitioner would look for one or more of these signs
Especially in the shoulders and arms
Numbness and tingling in the limbs
Difficulty moving the joints freely
Cramping and spasm of the limbs
Why Sang Zhi addresses this pattern
When Wind-Dampness lodges in the body and transforms into Heat, the joints become red, swollen, hot, and painful. Sang Zhi's neutral-to-slightly-cool thermal nature makes it suitable for this Heat-type bi pattern, unlike many Wind-Dampness herbs that are warm and could worsen Heat signs. Its bitter taste helps clear Dampness, while its channel-opening action relieves the obstruction causing the inflammatory joint pain. It is frequently combined with cooling herbs like Ren Dong Teng (honeysuckle vine) or Fang Ji for this presentation.
A practitioner would look for one or more of these signs
Hot, red, swollen joints
Swelling with heat in the affected area
Limb numbness with sensation of heat
Why Sang Zhi addresses this pattern
When Wind, Cold, and Dampness combine to block the channels, the resulting pain tends to be fixed, heavy, and worsened by cold and damp weather. Sang Zhi dispels the Wind-Dampness component and opens the channels. Because it is neutral in temperature, it does not by itself address the Cold component strongly, so practitioners typically combine it with warming herbs like Gui Zhi (cinnamon twig) or Qiang Huo to complete the treatment. The classical text Ben Cao Cuo Yao specifically notes that Sang Zhi paired with Gui Zhi treats shoulder and arm bi pain.
A practitioner would look for one or more of these signs
Pain worsened by cold and damp weather
Heavy, stiff limbs
Swelling in the lower legs, 'leg Qi' (jiao qi)
TCM Properties*
Neutral
Bitter (苦 kǔ)
Twig (枝 zhī)
This is partial information on the herb's TCM properties. More detailed information is available on the herb's dedicated page
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.