Congrats on your clean time! Unfortunately I do not know the answer to this question, but in my experience there are many causes. Dehydration, kidney disease, chemotherapy are just a few. Stay well hydrated . Were you injecting your drug of choice? That causes damage to the lining of the veins.
Hello and welcome. Congratulations on your clean time.
Why do you think it is your veins that are causing weakness & pain?
Could it actually be your muscles instead?
Congrats on getting your life back!! As for your question i have no clue. You might want to talk with your doctor about this.