Prodromal phase may refer to the following: 1. The tingling or burning feeling that precedes the development of herpes blisters. 2. A period in the course of schizophrenia, prior to the active phase of symptoms, during which the individual shows progressive deterioration in social and interpersonal functioning.
3. A phase before the seizure, in which an aura occurs odd, transient symptoms such as nausea, dizziness, or numbness may occur, as well as sensory alterations or hallucinations in any sensory domain 4. The interval between the onset of the earliest symptoms of a disease and the appearance of the disease itself.
Other /More definition:
Prodromal phase refers to a period in the course of Schizophrenia, prior to the active phase of symptoms, during which the individual shows progressive deterioration in social and interpersonal functioning.