The answer to 'when to treat for bed bug' 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 widespread. Signs of bed bugs include finding the bugs themselves, seeing blood spots on your sheets, or noticing itchy bites on your skin.
Professional pest control treatment is typically the most effective way to eliminate a bed bug infestation. A licensed exterminator will inspect your home, identify the extent of the problem, and develop a customized treatment plan using a combination of chemical and non-chemical methods. They have the expertise and equipment to thoroughly treat all areas where bed bugs may be hiding.