We’ve all had that moment: you see a cockroach scurrying across the floor and your first instinct is to smash it. But while it might feel satisfying, squishing a cockroach isn’t just ineffective — it could actually make things worse. Here’s what you need to know.

Crushing cockroaches doesn’t work — and it might backfire

Cockroaches are surprisingly tough. Their exoskeletons are incredibly resilient — strong enough to survive pressure up to 900 times their body weight. That means even if you think you’ve crushed one, there’s a good chance it might still be alive and crawling around later, especially if you just toss it in the trash.

But there’s more. When you crush a cockroach, you may be releasing allergens into your home. Their shells contain particles that can trigger allergic reactions — things like sneezing, itchy eyes (conjunctivitis), or nasal issues (rhinitis), especially in kids or sensitive individuals.

Squashing cockroaches might make your problem worse

Here’s something a lot of people don’t know: dead cockroaches actually attract more cockroaches. These pests are scavengers — they’ll happily feed on their own kind. So when you leave a squished one behind, it can become a food source and draw in even more.

Even worse, when cockroaches are killed in a certain way — like being crushed — they release stress pheromones. These chemicals signal danger to other cockroaches, causing them to scatter and hide deeper in your home, making them harder to eliminate.

What you can do instead

1. Keep things clean