I have a pain in the vein behind my knee. It hurts a lot, especially when it's cold or when my legs are put in contact with anything cold. Please help!
I have answered your question in my comment to your sharepost.
I wish to re-state that I am not a doctor so you really do need to seek a doctor's guidance for your symptoms.
Thank you for your question.
If you think you may have pain in the vein inside your leg you may want to get it assessed by a doctor. It can also be something to do with blood clotting in the vein which should be looked at.