Itching of the feet after drinking alcohol is usually caused by the following factors: 1. A common factor is that the ethanol in alcohol decomposes in large quantities in the liver and releases acetaldehyde, which is a toxic, harmful chemical that can cause the body’s peripheral capillaries to expand rapidly. Such substances will dilate the peripheral capillaries, while opening the arterial and venous short circuits and direct pathways, which will cause blood to sequel in the capillaries, so it will produce itchy peripheral nerves and peripheral circulation disorders.2. Itchy feet after drinking alcohol may also be caused by the peripheral circulation and peripheral radiculitis of the feet, and the peripheral nerve roots will be abnormally sensitive after drinking alcohol, and clinical symptoms and manifestations of itchy feet will usually occur.3. The process of acetaldehyde release will also release inflammatory mediators in the body, such as bradykinin, leukotrienes and prostaglandins, etc. Such inflammatory mediators will cause the body to experience self-induced itching and pain, numbness and clinical symptoms, especially in the peripheral nerve root distribution is significant, so it will be self-induced itching in the feet.