Collapsed veins may never recover. Much smaller veins are created by the body to circulate the blood, but they are not adequate for injections or IVs.
This is a typical scenario found with many prolonged IV drug abusers.
If all veins in the arms, hands, and feet have collapsed, a physician can do a "cut down" in which a vein is exposed by cutting through skin layers to get to the vein.
Sometimes the vacuum collapses the vein.
When a volcano collapses on itself a caldera is then formed.
sinkhole
The collapses star gets squeezed by collapses gas and turns into a black hole.
A Headland is formed
It collapses.
it will all dissappear
Yes, if the star is massive enough when the core collapses a supernova explosion happens.
The can collapses and closes in on itself.
The core collapses
When a volcano collapses on itself a caldera is then formed.
If you poke your Vein with a needle, you will bleed slowly (nonstop), Painless but Suicidal.