A patient who is currently in the hospital learned from a relative or friend that an herb was more effective in treating gangrene during local treatment, so he picked it up and used it. We all wonder why it is not as effective as it is “said” to be. Let’s take a look today! First, diabetic foot patients with peripheral vascular disease of the lower extremities have a high chance of this condition will lead to poor blood flow. We use topical drugs (not to mention herbal medicine, herbal medicine effect is even lower), even if there is blood circulation, improve the effect of circulation, but how to absorb? The inflammatory tissue above the infection necrosis has been deactivated, does not have the ability to absorb drugs, has been completely gangrenous, not to mention that the drug concentration can not reach, no effect at all. Second, folk herbs, sometimes although there are some drug ingredients, but the content is, after all, less. For example, we say that bitter melon contains ingredients to lower sugar, but the effect of eating bitter melon to lower blood sugar is tiny, only to refine these ingredients to a certain dose to have an effect. Similarly, the external application of herbs is difficult to reach a certain concentration, the effect simply does not play out. Third, diabetic foot it is not a simple local problem, but the overall body condition in the local performance, the patient not only wound ulceration, there are peripheral nerve, vascular disease, some patients will have diabetic nephropathy, eye disease, hypertension, hyperlipidemia, cardiovascular disease, etc., these are factors that affect the wound healing, drugs alone is certainly not possible. To sum up, if a herb or Chinese medicine can cure a diabetic foot, there must also be prerequisites for it to work, such as debridement, and at the very least, the inflammatory tissue must be cleaned up. So we must be vigilant and never blindly use herbs when encountering treatment with such problems, otherwise we may not be able to cure the disease even by taking too many detours.