How can you tell if you were bit by a bed bug?

Bed bugs: May have no sx's/signs except for 2 small skin puncture points. A reaction may show from 1 hr to several days later. It can cause itchy, pink, swollen, lesions w clear center. If hypersensitive blisters may occur. Telltale sign is linear track of lesions from sequential feedings – doesn't always occur. Bites are in areas exposed while sleeping-arms, shoulders, neck ; legs.