Scientists are calling attention to an extremely common health problem that's been making astronauts uncomfortable: sinus issues.

Researchers from Houston Methodist hospital’s Department of Otolaryngology – Head and Neck Surgery reported the results of their recent study that probed whether astronauts experience sinonasal issues, which include common symptoms such as nasal congestion and pressure or pain in the face, while in space. Sixty out of 71 (85%) of astronauts included in the study confirmed having such symptoms.

While it's common to experience some unsavory symptoms when your sinuses are working overtime to ward off intruders in the air, or when your immune system activates to fight off a virus or infection, the study researchers link astronauts' congestion problems to the way microgravity causes fluid in the sinus cavities to shift.

While usually benign here on Earth, study lead author Takashima warns in a that it is those very seemingly mild symptoms that can potentially affect things like problem solving or overall health..

"This is about maintaining peak performance," Takashima said. "If you’re not sleeping well because you can't breathe, your cognitive function, reaction time and mission performance can suffer, and those things are absolutely critical in space."

Doubling down on space's effect on the delicate, important irrigation system running through your head, researchers also found that astronauts leaving the cabin for spacewalks were particularly affected by pressure shifts that lead to problems potentially more dangerous than congestion, such as dysfunction, which are issues in the little tubes that connect your ears to your throat..