Extremely stabbing pain in one area of ​​the back (only with certain movements)?

• Pain at the red dot

Hi, for a few weeks now I've been experiencing extreme stabbing pain in the marked area when making certain movements.

I do weight training, but I never have problems with them when doing back exercises; in fact, they suddenly disappear.

Even if I massage something there, they go away for a short time but then suddenly they're back again.

Does anyone know what this could be or have you had this before?

How do I get rid of it?