Haley Bieber opened up about the painful symptoms she is experiencing during her pregnancy.

The supermodel took to her Instagram Stories on Wednesday to share a selfie of herself wearing a sea-green quarter-zip sweater and her hair pulled back tight. She also pouted to show her frustration, captioning it, "So who was going to tell me about the back pain?" and adding a frazzled face emoji and two pregnant emojis.

According to Johns Hopkins Medicine, back pain is one of the most common symptoms experienced during pregnancy, caused by hormonal changes and the physical weight of the baby bump.

Coping with back pain includes correcting posture, squatting without bending at the waist, and applying warmth or cold to the painful area. Of course, one should always communicate the symptoms one is experiencing to a health care provider who can offer appropriate advice for dealing with discomfort and pain.

Hayley is expecting her first child with husband Justin Bieber, whom she married in 2018.

They announced last month that they were preparing to welcome their baby and shared a video and photos of their vow renewal ceremony featuring Hayley's bump on Instagram.

Since then, Hayley has been sweetly documenting her pregnancy journey, sharing photos of her baby bump and other snippets of her recent life, for example.

The Biebers have always been open about their desire to have children together, although they reportedly "didn't want to rush it."

The "Baby" singer (you write your own jokes, right?) told Ellen DeGeneres in 2020, "I'm going to have as many [children] as Hayley wants to push out. I'd love to have a little tribe myself. But it's her body and whatever she wants to do ...... I think she wants to have a few."