Just Had A Really Visible Cramp In My Vastus Lateralus,

Just had a really visible cramp in my vastus lateralus, then followed by intense shivers, teeth chattering.
I worked out earlier, squats.
I had some salt in water and now my cramp and shivering has stopped.
Is it just an electrolyte imbalance?
I've had it happen a few times before and salt always helps it, but it's quite scary when it happens.