Linked from
The 11 pages that link to Bed bug, each with the reason it gives.
ScabiesCompared with: Bed bug bites can cause itchy marks, but the insects do not burrow into skin.
TickCompared with: Bed bugs feed on hosts but are insects and do not remain attached like ticks.
FleaCompared with: Bed bugs feed on blood like fleas but do not jump or live primarily in fur.
PediculosisCompared with: Bed bugs bite humans but do not live on the body or cause pediculosis.