@manishgang, Congratulations on your transplant 6 months ago. And also, please accept my sincere Welcome to Connect.
It is great to hear that you reports are all stable that show that your liver is happy and settling into its new home. It is also great to hear that your CT showed nothing that could be the cause of your abdominal tightness and discomfort. I don't remember too much about my abdominal discomfort except for tightness, the weird (un)feel of the numbness, and the discomfort of constricting clothing. I did feel abdominal discomfort, but not pain, when I over stretched or exercised. And just now, I remembered that there was discomfort if I stood for too long. My transplant was 14 years ago.

In support of the experiences that have been shared in this discussion, here is another that will that will let you know what others have had to say about how they handled their abdominal discomfort.

- Post Transplant - Core numbness and Weakness:
https://connect.mayoclinic.org/discussion/post-transplant-core-numbness-and-weakness/
@manishgang, Is it possible that you are over-exerting yourself by trying to do too much, too soon? or too often?