Gina Rose of Nourished Naturally writes:

I often spend 5-30 minutes a day with my feet up the wall.
What’s going on in this pose?
Your femur bones are dropping into your hip sockets, relaxing the muscles that help you walk and support your back.
Blood is draining out of your tired feet and legs.
Your nervous system is getting a signal to slow down. Stress release and recovery time.
This position is great for sore legs, helps with digestion & circulation as well as thyroid support. If you suffer from insomnia try this before bed.

I’ve done this at times but at the time never thought through why it might be beneficial. Worth a try! And as they say, it doesn’t hurt to try – but of course it could and if it does hurt, obviously stop straight away.