The answer to 'how often for bed bug treatment control' is that bed bug treatments typically need to be done 2-3 times, with each treatment spaced 2-3 weeks apart. This is because bed bugs have a life cycle that includes eggs, which can hatch after the initial treatment. The follow-up treatments help ensure any newly hatched bed bugs are also eliminated.
It's important to follow the instructions provided by the pest control professional, as they will know the best treatment plan for your specific situation. They may also recommend ongoing monitoring and prevention measures to keep bed bugs from returning.