Olivia Munn said her hair is 'falling out in clumps' due to postpartum hair loss

• Olivia Munn opened up about a challenge she's faced since becoming a mom on Instagram.
• Munn, 41, shared that her hair was "falling out in clumps" because of postpartum hair loss.

Olivia Munn got candid about motherhood, saying she's experiencing postpartum hair loss after welcoming her son with comedian John Mulaney last year.

On Friday, the "Violet" actress shared an Instagram post that included a selfie and a photo of her son, Malcolm Hiệp Mulaney. Munn, 41, and Mulaney, 39, who were first spotted together in June 2021, announced their son's arrival in November 2021.

In the post's comment section, fashion designer Amber Farr joked: "Can I just have your hair for one day please?"

Munn responded to Farr and explained that she's dealing with postpartum hair loss.

"Ummm it's falling out in clumps post partum. I'll let you have it once I can grow it back and give it to you in better condition," Munn wrote.

Representatives for Munn did not immediately respond to Insider's request for comment.

According to the American Academy of Dermatology (AAD), it's not uncommon for new mothers to experience hair loss a few months after having a child because of falling estrogen levels. AAD noted that dermatologists refer to the condition as excessive hair shedding, and it's temporary.

The American Pregnancy Association reported that excessive hair shedding affects between 40% to 50% of women.

Munn and Mulaney revealed they were expecting a child in September 2021. During an appearance on "Late Night with Seth Meyers" that month, Mulaney told Meyers that they were both "really happy."

"You guys saved me from drugs, and Olivia and this baby have helped save me from myself in this early journey out of recovery. And yeah, I don't have a joke for that. I'm really grateful to you," Mulaney said.