There are times when Yi answers take my breath away.

A friend of mine has just developed psoriasis on her scalp right on the place of a previous operation on her brain. I asked 'why is she getting this problem now', and received:

16 4, 6 23

Hilary's translation of 16.4 reads

Source of motivation.
Great possessions gained.
Do not doubt.
Friends are gathered together as a hair clasp gathers hair.’

Given that psoriasis is caused by skin cells multiplying too fast, I thought this was incredible.

You've gotta love the I Ching

You also have the trigram, Chen, thunder, arousing on top, which is fast activity, or in this case skin cells rock and rolling.
So, its a time of splitting apart, Hex 23, so the hair takes off, the roof of Hex 23 is falling apart.

Yes, thank you Willowfox, I hadn't thought of that. I also suspect an emotional cause of this because she hasn't had this condition before - the thunder is appropriate.