In many accounts Sulphur, but if you don't believe they exist, they also don't smell.
Evil spirits have been known to smell like Calatheas. Calatheas are exotic flowers found in the tropical Americas. There is no proven reason that evil spirits smell like this. But many people have reported and proven to smell Calatheas flowers when using ouija board or other methods of bringing demons.
im sure they can make themselves smell like anything
Smells Like Teen Spirit That Smell
Smells like teen spirit.
When you smell or sense the evil spirit around you spray it with vinegar and it will go away they hate vinegar but you must be persistent as the spirit will come back after the smell is gone also if you clean your entire house with white vinegar is very good to remove evil.
an evil spirit
Good Spirit
An evil spirit's hammer and wrench are a ghoul's tools
Sightings - 1992 Evil Spirit was released on: USA: 1996
Oz - 1997 See No Evil Hear No Evil Smell No Evil 6-2 was released on: USA: 12 January 2003
No, scientifically these are not recognised to exist so they can not be cured.
No, suicide is not an evil spirit. Suicide is a complex and tragic outcome of mental health issues, despair, hopelessness, and deep emotional pain. It is important to seek help and support for anyone experiencing suicidal thoughts.