Disease

A soul-related infection that causes the victim to cough up or shed flowers

Flower, typically one liked by the victim

Starts of light (eg. Spitting up more flower buds) to enough to block the victim's throat

Being near flowers during a soul corruption

Coughing up flowers
Dizziness
Refusing to talk
Shedding skin
Growing flower-like appendages
Trouble breathing
Loss of appetite

Vision becomes blurry for short durations of time

Feeling like vines crawl up one's bodies
Irritability

Can go on for a month to at least a year

Very severe: If it's left uncured one can die

Passive Hanahaki disease- It stays inside the victim and slowly kill them by blocking their airways

Active Hanahaki- Takes the form of what the victim fears most before it attacks the victim and takes the form of passive hanahaki. It does attack other random victims to take its form

It can heal the victims from injures, perhaps out of way to make sure the victim dies from it alone

People can use hanahaki as a weapon or fertilizer

Some people can summon them for their own benefit

It produces flowers

It slowly kills the victim usually making them suffer without them being able to escape by killing themselves

Active hanahaki can harm around innocent people

Spirit Bond purifying the soul
Facing said fear or sorrow could allow it to loosen it's grip