User blog comment:Umbrello/Please Stop With the Eyes Dripping Blood/@comment-5239282-20140912191037/@comment-4849011-20140915161538

I think Necrosanity had some insightful commentary, and I agree that the explanation wouldn't fit monsters with no conscience.

Incidentally there's a condition called hematidrosis in which people have bloody sweat. https://en.wikipedia.org/wiki/Hematidrosis It has occurred in cases of great stress and also appears in Luke 22:43-44. If someone insisted on using blood in a story they could use that. However, it could only be used with someone in great distress, like someone who is about to die or is being controlled by someone or something.

Oddly enough, I found this article https://en.wikipedia.org/wiki/Haemolacria when looking up that article. As you can see by the article and its talk page there's some controversy concerning at least one case, but how weird is it that there's apparently medical literature on this?

Let's look at the tally.

Explanations for bleeding eyes- 3

Explanations for bleeding eyes that actually could fit the stories Umbrello is alluding to- 0