Why do makeup brushes shed bristles?
Some shedding is normal when a brush is new, but ongoing shedding usually points to cheap construction or poor cleaning habits.
Short answer
A small amount of shedding in a brush's first few uses is normal - loose bristles from manufacturing work their way out early on. Shedding that continues well beyond that points to the brush's construction or how it's being cared for.
Why it happens
Brush bristles are set into the ferrule (the metal band) with glue and, in better brushes, additional mechanical crimping. Cheaper brushes rely on glue alone, which weakens with repeated exposure to water and cleaner. Soaking the ferrule itself when washing, using harsh cleaners, or storing brushes bristle-down while wet all accelerate that breakdown.
How to prevent or fix it
- Keep water away from the ferrule. Wet only the bristles when cleaning; water reaching the glue inside the ferrule is the most common cause of ongoing shedding.
- Dry brushes bristle-down, angled off the counter edge. This lets water drain away from the ferrule instead of pooling in it, which upright or flat drying doesn't. See Brush Cleaner.
- Use a gentle brush cleaner, not dish soap or harsh solvents. Aggressive cleaners break down the glue faster than a formula made for brushes.
- Expect natural-hair brushes to shed a bit more. Natural bristles are more porous and slightly more prone to breakage than synthetic ones, so some ongoing minor shedding is expected there.
- Replace brushes that shed heavily after proper care. If a brush is cleaned correctly and still sheds noticeably, it's a construction-quality issue rather than something to keep troubleshooting.