The answer to 'how long does bed bug treatment treatment last' is that the duration of bed bug treatment can vary, but typically lasts 2-4 weeks for a complete elimination. Bed bugs are notoriously difficult to eradicate, and multiple treatment applications are often required to fully eliminate an infestation.
The initial treatment will kill many of the active bed bugs, but their eggs can continue hatching over the following weeks. Follow-up treatments are necessary to target the newly hatched nymphs before they can mature and reproduce. Professional pest control companies will usually recommend 2-3 treatment visits spaced 1-2 weeks apart to break the bed bug life cycle and ensure the infestation is fully eliminated.