The actress was brought to tears after suffering a toe injury during Friday's rehearsal.
"Oh, it hurts," Lachey said while inspecting her bloodied toe in a video obtained by People magazine.
Thankfully, Lachey's professional partner Maks Chmerkovskiy was there to comfort her.
"That is going to be so painful," he told Lachey. “That hurts my soul...I'm sorry, this is not nice.”
ABC News reached out to a rep for the ABC dance competition but didn't immediately hear back.
Lachey, 36, and Chmerkovskiy, 37, began the season by scoring 21 out of 30 points, trailing behind Jordan Fisher and Lindsay Arnold, who earned 22, and Lindsey Stirling and Mark Ballas, who scored 22 points.
Even with her injury, the mother of three is beating her husband, Nick Lachey, who's competing with Peta Murgatroyd this season. The two scored 18 points during the season 25 premiere on Monday night.
"Dancing With the Stars" returns Monday and Tuesday at 8 p.m. ET on ABC.