Help please! is bed bug's bite flat in skin or like a mountain in skin?

Often raised: Bed bug bites may cause no symptoms or signs in some people. When there is a reaction, it may not show until several days after the bed bug has bitten. It can cause pink, swollen lesions on the skin. What can be telltale is when there is a linear track of lesions from sequential feedings – but that does not always occur. Here are some tell tale signs that your bites are being caused by bedbugs.