Itchy skin may be related to blood heat, in addition to external wind, cold, dampness, phlegm, stasis, insect obscene, blood deficiency, wind dryness, liver and kidney insufficiency can cause itchy skin. 1. Blood heat: manifested as itchy skin, red and burning lesions, and intense itching. 2. External wind: those caused by wind-cold manifest as aggravated by cold and white rash; those caused by wind-heat manifest as red rash and aggravated by heat; those caused by wind-dampness have oozing when scratched. 3. Cold: cold itch in addition to the cold attack, but also due to the spleen and kidney Yang deficiency. 4. Dampness: the itch caused by dampness is manifested by the appearance of blisters. 5. Phlegm: Itch caused by phlegm often appears as nodules. 6. Blood stasis: itching caused by blood stasis manifests as localized purple spots. 7. Insects: the itch caused by insect lust is like insect line, bouts of itching. 8. Blood deficiency, wind dryness and liver and kidney insufficiency: most of them have dry and cracked skin, flaking and so on. If the symptoms of itchy skin appear, you should consult your physician and follow medical advice.