Kim Kardashian seems to be obsessed with her weight after becoming a mom for the first time. Despite losing a ton of weight after criticism for her weight gain while pregnant with North, 1, she’s still determined to lose more.

In a Twitter rant, the Keeping Up with the Kardashians star wrote she can’t lose the last “15-20 pounds” she put on while pregnant.

“No more excuses. my baby is 1 years old! UGH,” she tweeted. “I'm not gonna call it baby weight bc thats an excuse. i just gained weight & that's it. why is it so much harder to lose after baby though!!”

She then asked other moms if they have the same issues, noting her “hips and butt” were “big to begin with” but now they’re “huge.”

She then vowed she would eat “no carbs” and start “crazy workouts.”

While on a recent vacation to Mexico, Kardashian posted photos of herself in a bikini several times throughout the day.

images via Instagram from Kim Kardashian

“I think after having a baby u get so excited u lost a lot of weight then u get comfortable & eat how you used & it creeps back up,” she continued.

Three weeks ago, Kardashian posted a photo of herself from a few years ago and hastagged it “#SkinnyDays #OnTheTreadmillRightNOW.”

In an interview last month, Kardashian admitted her style is “way sexier” since becoming a mom because all she wanted to do is become a “MILF.”

image via INFphoto.com