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.

Sinuses refer to the maze of cavities running around our face and skull, which keep us healthy by cleaning the air we breathe and helping balance the fluids in our head. People typically experience unpleasant symptoms in their sinuses or nose when the sinuses become full

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