The cause of itchy allergies when hands and feet touch cold water is mostly considered to be cold urticaria. Cold urticaria is a cold-stimulated disease that forms itchy wind bumps and angioedema, and its cause may be related to heredity, exposure to cold wind, cold water, or other cold objects. Patients may experience itchy allergies when their hands and feet are exposed to cold water. Cold urticaria is characterized by the appearance of windburn, edema, and itching after contact with cold air, cold water or cold objects, and some patients may develop systemic reactions ranging from generalized urticaria to systemic allergic reactions, such as chest tightness, palpitations, abdominal pain, diarrhea, fainting and even shock. The cause of itching and allergy on hands and feet in contact with cold water is mostly considered to be cold urticaria, and it is recommended that patients seek medical examination to clarify the cause.