what is happening?

Hello.
I’ve been dealing with this problems for some years now but I decided that it’s time to find out what is happening.
When i get up in the morning, right between the pecks, I feel tightness, and pain. So, I extend my left arm and my sternum cracks. After that, I feel a lot less pain, but nevertheless, the discomfort is still there. It usually cracks when I haven’t tried for some hours. It’s like it recharges and when it’s full, again it cracks.
The fact that it doesn’t bother me when I train relieves me, but I would like to know what it is. It cracks sometimes if I extend my right arm also.
So weird situation.

Hi,

Unfortunately I’m not able to make a specific diagnosis via the forum for this issue, sorry. It sounds like a benign musculoskeletal issue more than anything dangerous. If it concerns you, an in-person evaluation and/or imaging may provide further information.