Kim Kardashian West's psoriasis is "almost gone".

Kim Kardashian West's leg (c) Instagram

Kim Kardashian West's leg (c) Instagram

The 37-year-old reality star has suffered with the skin condition, which causes red, flaky patches which can become itchy or sore, since last summer when her mother Kris Jenner spotted a rash on her daughter's legs, but it is now clearing up nicely.

Sharing a picture of her limb on her Instagram story on Tuesday (26.12.17), Kim wrote: "OMG my psoriasis has almost gone! Best Christmas present! (sic)"

The 'Keeping Up with the Kardashian's' star previously confirmed she gets a cortisone injection into her posterior "every few years" because of the condition.

She explained: "Every few years I get a cortisone shot. I just got one as my psoriasis was so bad in Vegas.

"That's a little unknown fact of me - I have to get cortisone shots every few years."

After Kim - who has kids North, four, and Saint, two, with husband Kanye West - had her first cortisone shot speculation spread that she'd had butt implants as pictures emerged of her with a dent in her butt.

She recalled: "I went to go get a cortisone shot in my butt.

"I lived right behind Kitson [a boutique]. One of my neighbours was a dermatologist at Cedars [Cedars-Sinai Hospital].

"I go in there and he's like, 'There's a one in a billion chance that you will get a huge indent in your butt.' Of course I get a huge indent on my butt.

"There is a picture of me in Miami wearing an electric blue dress, and another picture of me walking down Robertson.

"You see the indent. And I think that's when the rumours started, 'She's had implants.' "

Kim admitted she has "learned to live" with the ailment and that it "doesn't bother" her too much.