A sclerosed vein is a vein that has become hardened or scarred due to damage to the inner lining of the vein. This can be caused by conditions like varicose veins, blood clots, or inflammation. Sclerosed veins may appear as raised, twisted, or discolored lines on the skin.
sclerosed
Sclerosed means "to become hard or hardened."
It feels like it has a bounce or resilience to it.
If you're unconscious then you don't feel anything.
Irratating
Veins do not have nerves that detect pain, so they do not typically feel pain. However, if the vein becomes inflamed or there is damage to the surrounding tissues, it can cause pain or discomfort. Conditions like thrombophlebitis or deep vein thrombosis can cause pain in the affected veins.
Usually at the neck (the vein on the side) does.
The main symptoms of phlebitis are tenderness and pain in the area of the affected vein. Redness and/or swelling may also be seen.
"Palpate" a vein.... This is an acquired skill. A vein will have an elastic feel when lightly compressed and then released. There will also be a "collapse" sensation when it is compressed that will be distinctly different than the surrounding tissue. As most veins suitable for drawing blood will run along the long axis of the extremity these sensations should be detectable as you trace the path of the vein. The best way to learn is to start by palpating visible veins, then following the path of the vein as in passes deeper in the surrounding tissue. You may be surprised how far you can feel the vein once you do some practicing. With a constriction band (tourniquet) in place the feel of the vein will be more pronounced. Practice palpating a vein without one to get good at it!
Cephalic vein. To locate the cephalic vein, rotate the patient's arm so that the hand is prone. In this position, the weight of excess tissue often pulls downward, making the cephalic vein easier to feel and penetrate with a needle.
They locate them by looking at your arm and finding the different color of the vein and/or they tie off your arm (which they will do regardless if they see a vein or not) and feel the bump of the vein. If all else fails they will poke and see if they draw blood.