The reality star cancelled book signing appearances Wednesday due to the illness

By Lindsay Kimble
Updated November 19, 2015 10:40 AM
Credit: Noel Vasquez/GC Images

Khloé Kardashian is suffering from a staph infection, PEOPLE has confirmed.

“She’s home on antibiotics and being closely monitored a doctor,” a source says, adding that she contracted the infection from being by estranged husband Lamar Odom‘s hospital bedside “but it was exacerbated by stress.” She was diagnosed with the bacterial infection after noticing lumps on her lower body.

Odom, 36, was found unconscious in a Nevada brothel Oct. 13, and Kardashian, 31, dropped everything to care for him. After a week at Sunrise Hospital in Las Vegas – where he woke up from a coma after four days – he is now being treated at Cedars-Sinai Medical Center in Los Angeles. (A rep for the hospital told TMZ that staph is common, although Cedars’ incidence for the infection is below state and national averages.)

Now, because of her condition, Kardashian, who threw Odom an in the hospital earlier this month, can not visit him: “She is so frustrated by the fact that she was doing something good and then THIS happens,” the source says.

Another source says the reality star is recovering well: “She just needs some medication and some rest and she will be fine. She’s under a doctor’s care and they are happy with how she is progressing.”

Kardashian canceled signings of her book Strong Looks Better Naked on Wednesday, telling fans on Twitter, “I’m sick &dr’s orders are that I need to lay low until we narrow down what’s wrong.”

She later added that she was taking antibiotics and painkillers.

Kardashian also advised her followers that “stress can run our bodies down so please everyone take care of yourselves.”

Though Odom and Kardashian are not getting back together as a couple (she’s dating basketball player James Harden), Kim Kardashian West tells PEOPLE in this week’s issue that the famous family will “always be there to support Lamar.”

“You stick by your family,” she said, “and you are there to be the best support system in the world.”