Hanauso Disease 

Hanauso Disease is a fictional disease in which when the victim’s loved one lies or betrays them, flowers will grow out of the victim’s neck. Alongside that, the victim will be unable to talk until their loved one tells the truth.

Katherine had Hanauso Disease. That was the reason flowers were always growing out of her neck.

Hanauso Disease by jayquan. July 2, 2021