Kardashian told Allure last month that she undergoes laser treatments once her four children are asleep at night.
"I do my beauty treatments usually late at night. After everyone's in bed, I'm doing laser treatments," she said.
Kardashian recently launched her own skincare line, SKKN, which consists of nine products priced at US$630 ($1000) for the full set.
It comes after the star revealed a painful consequence of her controversial Met Gala crash diet.
Kardashian, who wore an iconic Marilyn Monroe dress to the event, told Vogue Magazine at the time she lost more than 7kg in three weeks to fit into the dress.
Appearing on the cover of Allure Magazine this month, the star said to achieve the significant weight loss she had to incorporate meat into her diet despite usually eating a plant-based diet. The change in diet resulted in her skin condition, psoriasis, flaring up, causing psoriatic arthritis.
The flare-up made her joints stiff and swollen, she said.
"Psoriasis broke out over my body and I got psoriatic arthritis so I couldn't really move my hands.
"It was really painful, and I had to go to a rheumatologist who put me on a steroid. I was freaking out. I cut out the meat again, and it's calmed down."