Can washing machine lint fibers cause lung inflammation?

What's actually in it

Every time you run the washing machine, it sheds microfibers from synthetic fabrics like polyester, nylon, and acrylic. Some fibers end up in wastewater, but many become airborne as lint. They float around your laundry room, settle on surfaces, and get stirred up when you fold clothes. You breathe them in without realizing it, especially in small, poorly ventilated laundry spaces.

What the research says

A 2026 study in Environ Res tested what happens when you breathe in washing machine lint microfibers repeatedly. The researchers exposed airways to lint fiber particles and measured the inflammatory response.

Repeated exposure triggered lung inflammation. The fibers activated immune cells in the airway, caused swelling of lung tissue, and increased the production of inflammatory chemicals. The response was similar to what researchers see with other forms of airborne particulate pollution.

The study suggested that chronic exposure to laundry lint, the kind you get from doing laundry several times a week in a small room, could contribute to respiratory problems over time. People with asthma or existing lung conditions may be especially vulnerable.

Good ventilation in your laundry area makes a big difference. Opening a window, running a fan, or using a dryer with an exterior vent can reduce the amount of lint fiber you inhale. Cleaning the lint trap regularly and wiping down surfaces also helps.