Interestingly enough, not all of us experience this. How does one get a brain freeze? Well, by consuming something cold really fast, like ice cream or ice-cold drinks. Typically it can last up to 20 seconds, and the pain you feel in your brain is  like someone pressing an ice cube on it.
I’m a brain freeze victim. I try to consume cold drinks at a slower rate to minimize the brain freeze from taking place.
How do you know if you have brain freeze? Well, you need the following;
1. A brain. It will not work otherwise so this is crucial.
2. A cold drink or a cold ice cream or a cold ice cream drink.
3. Consume it quickly.
Do you feel it?
If you don’t, then you are either not affected by brain freeze or you have failed to meet the fundamental requirement of Point 1. Uh oh.