Please note, I am not a doctor and I am not qualified to make medical claims or diagnose diseases. If you have any medical questions, please visit your doctor.
When the vein is blocked, it is impossible to breathe and you are in a state of shock. This can be fatal. A person can only survive in this state by receiving emergency care within minutes, or to be revived. Some people are more sensitive to pain, so may feel more pain than others and may even feel numb for a few hours, but may not be aware of their pain until hours later. Some people can be put under anesthesia to relieve their pain, but you should be aware that even if you are given an anesthetic, there is still pain.
Varicose Veins are caused by damage to the veins. There are two types of damage that can cause this: an obstruction, that is when the vein's tissue is too narrow to fit through the blockage. (For example, a blockage at the heart or a blockage in the veins in the legs). And, damage to the blood vessels.
An obstruction results when there is an obstruction between two veins, called a blockage.
An obstruction causes the varicose veins to become narrow.