Hi Alexandra
For shifting pain at this time of year with a purple dry tongue, a better choice might be Move Freely. It's basically Shen Tong Zhu Yu Tang, a combination Blood mover and Wind expeller
I would also wonder, though, with that past history, about Si Miao San with added Mu Gua (20g per 100g). It's a muscle antispasmodic, yet will prevent laminitis if used this spring, and will address the elevated ACTH
If, on the other hand, you see active GB channel points and the pulse improves when they're needled, then Xiao Chai Hu Tang is the way to go
Hope that helps!
Steve