The name pretty much gives it away. Assassin bugs are killers and do this by causing Chagas disease. If you are bitten by an Assassin Bug, it will try to inject your blood with its highly lethal toxin.
These bugs often actively hunt for potential prey, even though they are so small. The venomous substance they inject affects your muscles, nerves, and tissues while the saliva of Assassin Bugs can even cause temporary blindness. A single bite from these bugs can be extremely painful .. at least you will definitely know if you have been bitten by one!