Rub your eyes vigorously
Stay up late or sleep poorly
Expose your eyes to smoke, dust, or dry air
Wear contact lenses for too long
Use eye drops that can cause rebound redness
Spend long periods staring at screens without breaks
Swim in chlorinated water without proper eye protection
Avoid blinking for extended periods
Use makeup or skincare products that irritate your eyes
Get enough rest and use artificial tears if redness is from irritation