Shiver down the spine

'Shiver down the spine':

Shudder
A shiver runs down your spine means a shudder is felt on your skin, usually on your back, neck, or arms. It can be caused by fear, anticipation, nervousness, or excitement. It is also a sign of the release of adrenalin in your body. Sometimes, it can be a message that a certain event or enemy has appeared in a game.

'Shiver down the spine': Reporter explains which witness keeps Trump up at night

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goosebumps
noun [ plural ]
(UK also goose pimples)
small raised areas that appear on the skin because of cold, fear, or excitement:

You're cold - look, you've got goosebumps!

get goose bumps (redirected from get goosebumps)
get goose bumps

To get bumps on one's skin where one's body hair stands on end as the result of an intense feeling of cold, nervousness, anxiety, excitement, or fear.
I got goose bumps watching that scary movie last night!
Their concert was so amazing, I got goose bumps when they played their first song!
It's so cold in here that I'm getting goose bumps.

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"A cold sweat ran down my spine" is an idiom used to say that someone feels very thrilled, frightened, etc. Sweating is a normal response to exercise or hot weather, but it can also be a symptom of anxiety, menopause, or an underlying health condition. It could also be a side effect of some medications.