From your description, this “stone-like hardness” in the leg along with pain is unlikely to be related to
uric acid, especially since the value (5.1) is within normal range.
Common causes in such cases include localized muscle spasm, varicose veins, thrombophlebitis (vein inflammation), or less commonly a clot (DVT)—especially if there is a feeling of hardness along a vein. Given the history of heart surgery, it is important to NOT IGNORE vascular causes.
Since the symptoms have shifted from one leg to the other, a musculoskeletal cause is also possible, but proper examination is needed.
Next Steps
-Get a clinical examination by a physician/surgeon
-Do a Doppler ultrasound of the leg to rule out any venous clot or vascular issue
-If Doppler is normal, consider orthopedic evaluation for muscle/joint causes
Health Tips
- Seek urgent care if there is leg swelling, redness, warmth, or sudden increase in pain
- Avoid prolonged sitting/immobility
- DO NOT massage the area until a clot is ruled out
- Keep the leg slightly elevated when resting