This is a skin condition characterised by wheals that appear suddenly and may also disappear within several hours. There is often itching. When they reappear they often reoccur in the same area. They can be acute or chronic (over four weeks).

Diagnosis is made according to a differentiation of syndromes within the theory of Traditional Chinese Medicine. Excellent results are often obtained from treating this condition with acupuncture. Allow ten treatments to comprise one course of acupuncture and there should be some significant changes.