My pain is random, intermittent, and infrequent. I'm 68 years old, and this has been going on for many years.
The pain can appear anywhere-top of head(skull or hair area), anywhere in the thorax, abdomen, arms, groin.
When it appears, it stays there-in that spot. I can ignore it, and, hours later, it will go away.
It can stab me several times per minute, or once every few minutes. It is independent of activity or touch, usually.