go hot and cold

go hot and cold

experience sudden feelings of fear, embarrassment, or shock.
1973 Anthony Price October Men His wife had said…that she had gone ‘all hot and cold’ after nearly being run over.
See also: and, cold, hot

go ˌhot and ˈcold (all ˈover)

(informal) suddenly feel very worried, upset or frightened when you remember something very unpleasant: I go hot and cold all over when I think of that train accident. It was so terrible.
See also: and, cold, hot