If your back is constantly feeling stiff or tight and you need to constantly crack your back to temporarily relieve pressure then it's a sign that something is wrong with your back.
Your back should not feel tight or stiff for too long.
Also there's delicate tissues and other parts of your body that can be damaged when you crack your back and in some cases it could paralyze you if you do something wrong.
You can cause the disc in your back to slip or herniate.
Cracking your back can feel good but if done to often or not done correctly it could be dangerous.