What happens when a vein collapses?

Answer 1

If blood is unable to flow smoothly it clots. The lining of arteries, veins and capillaries is perfectly smooth so that the blood can flow without clotting. The reason blood clots when you cut yourself is because as it leaves the blood vessels it stops flowing smoothly.

Introducing a needle (that tears and scratches the vein lining) and then drugs (that can irritate and cause swelling of the vein lining) creates turbulence in the blood flow.

This causes tiny clots to form on the lining of the vein. These tiny clots roughen the lining causing more turbulence - and the formation of more small clots. Gradually the vein fills up with the clots and blocks.

The clots then turn into scar tissue which shrinks, pulling the sides of the vein together, leaving it 'collapsed'.

Veins that are damaged or swollen may partially recover, but collapsed veins never recover. The blood finds another way back to the heart and lungs through smaller or deeper veins further back down the system.

By the time ‘new veins’ start appearing, vein damage is usually quite bad - the lack of veins means that blood is being pumped into the arm or leg faster than the veins can carry it away. This makes the hands, feet or whole limb swollen, puffy, cold and blue. This is irreversible. It is a sign that injecting has caused serious, long-term damage.

Collapsing veins mean that the return blood flow is reduced. Blood flow is essential to healing - without enough blood flow, injection sites and cuts become more prone to sores, infections and boils.

If the collapsed veins are in the leg or groin, small scratches and knocks to the feet and legs can’t heal and can form ulcers. These are incredibly painful sores that take months or years to heal.

Sometimes blood flow is so poor that areas of skin start to die, gangrene sets in and the infected bits have to be removed by surgery.

Problems such as:

* Infections that don’t get better
* Areas of skin dying
* Ulcers
* Gangrene

or

* Rings you can’t get off swollen fingers can get really serious.

Answer 2

if it is a major vein, that can be problematic, otherwise blood flow is just redirected to another vein. think of a stream splitting into 2 then blocking one side, the water flows down the other. Veins are elastic so they can handle this extra blood flow.

Answer 3

which vein u r talking as v've so many veins in our body.a small vein collapses doesn't affect much to our body if it's in ur legs or hands.

Answer 4

It's your body's way of saying it's time to stop doing that so one of the things that could happen is you change your behaviour. Another thing that could happen is you could ask a doctor. By the way if it keeps on happening your choices will get fewer.

Answer 5

it simply falls over and occasionally hits its head on a tendon or bone, in which case it takes a bit longer before it recovers and is restored to its normal state.

Answer 6

Your body would be perfectly alright. Why are you asking this question?