Q&A: Can constipation cause depression?

by Ayurvedic-Medicine
Question by Lisa M: Can constipation cause depression?
I know it's a silly question but in the middle-ages they thought that people who suffered from 'melancholy' or depression had problems with constipation and excessive bile. It sort of makes sense since if you can't relieve yourself you'd end up with not only painful digestive problems but perhaps excessive toxins in the bloodstream from the bile....and what not.
Is there any scientific/medical proof to

depression and anxiety scale