Spider bite or bed bite, how can you tell?

Bed bug bites may: Cause no sx's/signs in some except for 2 small points where skin was punctured by bedbug. When there's a reaction, it may show from an hour to several days after bite. It can cause itchy, pink, swollen, lesions w clear center. In cases of hypersensitivity blisters may develop. A telltale sign is linear track of lesions from sequential feedings – but that doesn't always occur. Bites are usually >.