Chinese Tamarisk Twig Classic Formulas

Primary Actions

Releases the exterior and dispels wind - Xi He Liu is used for early-stage exterior wind presentations, especially when light sweating and venting are needed without harsh dispersal.
Promotes measles eruption - the twig has a classic role when measles or other rash illnesses do not vent smoothly to the exterior and heat remains constrained beneath the surface.
Resolves toxicity and relieves itching - internal or external use is described for pruritic skin conditions, damp-toxic irritation, and toxic swellings with prominent itching.
Unblocks channels in wind-damp pain - some regional sources also note use for rheumatic aching and painful obstruction, especially when the exterior and superficial collaterals are involved.

Xi He Liu with Niu Bang Zi, Chan Tui, and Bo He - eruption-promoting pairing logic for incomplete measles expression or wind-heat rash that remains trapped under the surface.
Zhu Ye Liu Bang Tang - traditional formula logic in which Xi He Liu helps vent the exterior and guide rash outward while accompanying herbs clear heat and throat toxicity.
External Xi He Liu wash with Ku Shen or Bai Xian Pi - folk and regional approach for itchy skin, superficial toxic lesions, or damp-wind irritation.

TCM Wiki describes Xi He Liu as sweet, acrid, and neutral, entering the Lung, Stomach, and Heart channels, with actions of inducing diaphoresis and promoting measles eruption.
American Dragon adds traditional indications such as common cold, rheumatic arthralgia, and pruritic eruptions, illustrating the twig's overlap between exterior release and superficial detoxifying use.
Later herb summaries repeatedly emphasize that Xi He Liu is best known when rash illness is not venting properly, which keeps its clinical identity distinct from stronger diaphoresis herbs.