Fishweed cannot treat diabetes. Fishweed has the effect of clearing away heat and detoxification (removing heat and toxicity from the body), diabetic patients with indications can eat fishweed, need to follow the doctor’s instructions for medication. Fishweed is a kind of taste pungent, cold nature of the Chinese herbal medicine, has the effect of clearing away heat and detoxification, eliminating pain, swelling and healing sores, diuretic and dehumidification, stomach and digestion, etc., can not be used for the treatment of diabetes mellitus. The adverse reactions and contraindications of Fishweed are not clear, and it should be used under the guidance of a doctor. Diabetic patients should be through diet therapy, exercise therapy, medication and other comprehensive treatment means, so that blood glucose is maintained within the target range, and regular monitoring of blood glucose fluctuations. Fishweed has no role in the treatment of diabetes, diagnosed diabetes should be standardized treatment under the guidance of a doctor, do not trust the prescription, so as not to miss the condition.