The causes of itchy feet after drinking are: 1. If accompanied by a rash that gradually appears on the whole body and feet, it may be that the patient has an alcohol allergy; 2. If accompanied by tinea pedis, it may be that the patient has a fungal infection on the feet, which is often called foot odor; 3. If a rash appears on the feet alone, it may be that the patient has eczema or contact dermatitis, or it may be insect bite dermatitis. These skin diseases can recur or worsen after drinking alcohol; 4. If the patient has diabetes, it may be one of the complications of diabetes, such as peripheral neuropathy.