The Nirvana frontman was found dead aged 27 after a supposed self-inflicted gunshot wound to the head nearly 25 years ago.
His passing sparked a series of conspiracy theories – with many fans looking for hidden messages answering why in the band’s lyrics.
Along with three Nirvana albums, Kurt also produced a range of unsettling art that offers a window into his tortured mindset.
In one of his works, a skeletal figure is drawn onto a green background – an apparent reference to Kurt’s slight frame.
His ex-girlfriend Tracy Marander said during documentary Kurt and Courtney: “He felt like he was too skinny.
“He tried to gain weight and tried to work out a little, but he couldn’t gain any weight.”
Kurt was apparently teased in school and made up for it by over-dressing.
Tracy added: “There’s no way you could wear that many layers of clothing and still be comfortable.
“I think he was fascinated by things that were gross”
Kurt’s ex-girlfriend Tracy Marander
“Sometimes he’d wear a pair or two of long johns, ripped up jeans over it, a couple of T-shirts, sweatshirt, a flannel shirt and a jacket.”
Kurt also painted an abandoned foetus, left among a series of burning trees.
Tracey explained: “I think he was fascinated by things that were gross. All the blood and mucus and tissue stuff didn’t really appeal to him (outside of art).
“He made this collage of diseased vaginas and pieces of meat pasted together.”
In another – titled Fistula – a woman’s face is planted onto an insect’s body.
The piece later went on exhibition along with several of Kurt’s other works.