Painful rash

Itching rashes are very often heat in the blood. While the patient may have an underlying yin deficiency as well you may also see signs of this from too much internal heat over time. It would depend on how long it has been going on and on other signs. Generally, however, if the rashes are relatively acute you would first clear heat, I tend to use Xiao Feng Wan.

You need to be careful clearing too much heat with yin deficient patients but these conditions, if acute, should clear relatively quickly. Then you could use something like Liu Wei Di Huang Wan, or others, to resolve the underlying yin.

It would be best to provide some more specifics about the rash. For example you can have a yin deficient patient that develops poison ivy - treating their yin deficiency doesn&#39t make the poison ivy go away. In some cases you can have symptoms more or less entirely unrelated to underlying patterns. It is often a grave error to assume everything is related systematically. It would be great if the medicine worked that way, but in clinical reality this is far from the truth.