Your asthma could get worse
Noah Siegel, M.D., a board-certified sleep physician at Harvard and otolaryngologist, says that people suffering from dust allergies or allergic asthma could experience nasal congestion and airway breathing problems while sleeping on a dusty old mattress. Cynthia Bodkin, M.D. Indiana University Health neurologist and sleep medicine physician, adds that sleeping on an old mattress won’t directly cause nighttime asthma, but it could worsen symptoms for those who have the condition.