Bed Bug Bites vs Mosquito Bites
Like mosquito bites, Bed Bug bites do not wake the victim. Thus it may be difficult to ascertain whether bite marks are caused by Bed Bugs or mosquitoes. To determine whether you have been bitten by a Bed Bug or mosquito, check if the bites are clustered and aligned in a line, or isolated; Bed Bugs usually produce clustered bites that aligned linearly while mosquito bite patterns are more random and further apart.
Another way of finding out whether the bites you recently receive originate from mosquitoes or bed bugs is to observe the period of time when you received the bites. Bed bugs are generally only active at night so if you notice bite marks appearing only after waking up, it is highly likely that these marks are bed bug bites. Conversely, mosquitoes can be active any time in the day or at night, allowing them to feed on human blood at any time. Thus, if you notice freshly-formed bites on your skin in the day, it is more likely that they are from mosquitoes rather than bed bugs.