The answer to 'when to treat for bed bugs' is to treat for bed bugs as soon as you suspect an infestation. Bed bugs can reproduce quickly, so it's important to address the problem right away before the infestation becomes more severe. Signs of bed bugs include itchy bites, blood spots on your sheets, and actually seeing the small, reddish-brown bugs themselves.
The best time to treat for bed bugs is as soon as you notice any signs of an infestation. Waiting too long can allow the bed bug population to grow, making them more difficult to eliminate. Professional pest control treatment is typically the most effective way to get rid of bed bugs, as they have specialized equipment and products to thoroughly address the problem.