Why would you expect edema when the osmotic pressure decreases, but not when it rises?

Question

thanks

Answer 1

Osmotic pressure is the pressure that you need to stop water from flowing into a certain area. If that pressure decreases, water will flow in and you will have edema. If the pressure increases, it will be even harder for water to flow in.  

Answer 2

Think of a garden hose.

You turn on the hose ( pressure ) and then you shut it off.( lower pressure)

The water flows down to the bottom of the hose ( near the faucet) and sits there.

Just like in your body. When the pressure drops the fluid sits in your hands,feet, ankles,calves causing edema.