In your case, though you have had
liver transplantation, your complaints are most likely due to venous insufficiency because your legs are painful and heavy after standing for a while but not even while you are at rest and you don’t have any other symptoms (assuming so because you have mot mentioned any.) Even then, along with regular
LFT, you can also get certain other tests like serum
albumin, INR, abdominal ultrasound, colour doppler of both lower limbs.
Next Steps
Get the advised tests
Health Tips
Consult vascular surgeon and surgical gastroenterologist