I came across these home remedies in From Age to Age: Life and Literature in Anglo-Saxon England:
For swollen eyes:
Take a live crab, put his eyes out, and put him alive again into water, and put the eyes upon the neck of the man who hath need. He will soon be well.
For an earache:
Take garlic and onion and goose fat, melt them together, squeeze them on the ear.
As an antidote for poison:
If a man eat wolfsbane [an herb] let him stand upon his head, let someone strike him many scarifications on the shanks, then the venom departs out through the incision.
For a headache:
Look for stones in a young swallow’s stomach; and take care that they touch neither earth, water, nor other stones. Select any three of them that you choose; put them on the person in distress: he will soon be well.
And for lunatics:
In case a man be a lunatic, take skin of a mere swine, or porpoise, work it into a whip, swinge the man therewith, soon he will be well. Amen.
Now, if I can just find a young swallow…