Kent gives an explanation of "sick headache" under Eupatorium:
Pain in the base of the brain and back of the head, associated with gouty joints. These are often referred to as arthritic headaches, that is, gouty headaches, headaches associated wtih painful joints. Or the headaches may alternate with pains in the joints. Congestive headaches, the pain being in the base of the brain, with more or less throbbing; the pain spreads up through the head and produces a general congestive attack. Sometimes these headaches come on when the joints are feeling better, and the more headache he has the less pain he has in the extremities; and again, when the gout affects the extremities, then the headaches diminish. Headaches, having a third and seventh-day aggravation, coming with more or less periodicity. With the headaches there will be nausea and vomiting of bile, nausea at the thought and smell of food. This gouty individual is also subject to vertigo, and the sensation as if he would fall to the left. Sometimes in intermittent fever this symptom of swaying to the left and vertigo ending in nausea and vomiting, violent pain in the back of the head and pain in the bones, are the first threatenings.
I love reading Kent's MM as he gives these gems in the strangest places - sometimes just in the middle of some remedy where you would never know to find it!
Truly,
Erica

