The leaky blood vessels pour out protein rich exudate which causes swelling.
This goes beyond a simple patient-doctor relationship but I think our friend needs to pour out everything that's troubling.
A man "that speaketh in a tongue speaketh not unto men, but unto God; for no man understandeth;" and therefore it is expedient that he keep this gift for his private chamber and there pour out the mysteries.
Joel's prophesy clearly envisages a role for young an old " I will pour out my Spirit on all people.
Michael came late to writing sonnets, which seem to pour out of him.