Catelynn Lowell is suffering from "restless legs."

See 'Teen Mom' Catelynn Lowell At 33 Weeks Pregnant

As she awaits the birth of her and Tyler Baltierra's second child, the Teen Mom star has experiences some pregnancy pains, which she spoke about on Twitter.

"Omg these restless legs are REALLY starting to drive me up a wall! Can't wait till they are gone FOREVER!" Lowell told fans on Sunday.

Catelynn Lowell & Tyler Baltierra Are Releasing A Book

Lowell and Baltierra were seen on MTV's 16 & Pregnant in 2009, when Lowell was pregnant with her first child, daughter Carly. In the years that followed, Lowell and Baltierra were featured on Teen Mom, as well as VH1's Couple's Therapy.

In August, Lowell and Baltierra announced they were expecting their second child. Around the same time, the couple, along with their Teen Mom co-stars, including Maci Bookout, Ryan Edwards, Amber Portwood and Gary Shirley (Farrah Abraham was reportedly left out of the series), began filming the reality series' fifth season.

"The original Teen Moms are coming back! MTV stars Maci Bookout, Catelynn Lowell, and Amber Portwood — who appeared on the first iteration of Teen Mom in 2009 — are returning for a new season in 2015," Us Weekly revealed in August. "Their former costar Farrah Abraham will not be joining them."

While there had been speculation regarding Lowell possibly giving birth at the end of last week, Baltierra confirmed she was still pregnant on Monday, telling fans, "The baby is still in there."

Lowell is due to give birth sometime next month. An exact date was never confirmed.

Tags: catelynn lowell Tyler Baltierra