Sinus Infection is a passive item in The Binding of Isaac, added in the Afterbirth+ DLC.

Grants a 20% chance to fire a booger tear that sticks to enemies and deals damage over time.

Damage is equal to Isaac's damage stat and is dealt once per second.

Boogers last for 10 seconds before disappearing.

Boogers don't inherit Isaac's tear effects, despite them changing appearance.

Boogers will pierce through bombs and fire places.

Multiple boogers can stick to the same enemy, resulting in stackable damage.

If an enemy dies, jumps or teleports while having a booger attached to them, the booger will slowly fall to the ground and can stick to another enemy before disappearing.

The chance to fire booger tears is not affected by luck.

This page shows the latest information as of the new Repentance+ (Online Co-op) DLC.
To see information about this item for the previous Repentance version, check this page instead.

Sinus Infection can be found in the following item pools:

The following tags are applied to this item:

The following special synergies and interactions for Sinus Infection have been documented.

* Note that not all possible synergies and interactions are listed here.

Below is the Internal Item Description as shown in-game.
Note that some stat changes are not displayed here. Please see the main description for the full effects.

Sinus Infection

• Chance to fire booger tears that stick to enemies and deal periodic poison damage
• Abyss: x1 poison locust 1.5x Isaac's damage

• Check out the item description on the external Isaac Wiki.