Thank you for the query.
is not a disease which do appear constantly for 4 years. It does not work that way. Typical symptoms of veins thrombosis is swollen, painful, hard and sensitive to touch calf. It is swollen all the time.
Your pains can be caused by veins insufficiency and varicose veins
(the leg gets swollen when standing for a long time), nerves compression (sciatica
) if the pain radiates to the hip and to the back, bones pain (the pain appears mostly in the night and aspirin helps with it).
I suggest you to verify your veins ultrasound
and see if the saphenous vein is sufficient and if not mentioned anything about it, you should have Doppler veins ultrasound to find it out.
Next step should be neurologist
visit and EMG test performed to check if the nerves conduction is fine. Leg bones X-ray should be done to rule out any bones diseases.
Spine MRI should be also considered.
Hope this will help.