Hot flushes during pregnancy are a relatively frequent discomfort, which consists of a sudden heat that the woman notices, especially in the head, neck and chest.
The onset of hot flushes is independent of the external ambient temperature and is therefore usually unexpected. In addition, hot flashes can be diurnal or nocturnal.
As for the duration of hot flashes, this is variable. However, hot flashes are usually brief, lasting a few seconds or a few minutes.