"My finger has been an ongoing injury I've had since I was playing in the under-20s," he wrote.
"Originally, I ruptured the tendon and this is the sixth surgery I've had on it.
"It's the middle finger in my left hand and, a while back, I got it fused. I've got no knuckle in it. The doctor said I could either cut it off halfway or fuse it. I've had it fused several times now because I keep breaking it.
"I can't bend the finger, so it's like I'm constantly giving people the bird. If I clench my fist, my middle finger sticks out.
"One time, a while back, I accidentally cut someone off while I was driving and I put my hand up to wave at them to say sorry.
"The guy followed me all the way into a dead-end street. We each got out of our cars and he asked me if I'd stuck my finger up at him. I explained to him that I'd had it fused and it stuck out naturally. He understood after that.
"I don't know what he was trying to achieve following me. He wasn't a big bloke or anything, just an average Joe.
"I've decided this is the last time I'm getting it fused. It's the fourth fusion that's broken and if it happens again I'm going to have it cut it in half, because I'm just over it.
"It might leave me with only half a finger, but I guess it would save a lot of confusion."
This year will be Crichton's last season for the Rabbitohs before taking up a contact with the Sydney Roosters.
