One of the most common signs of bed bugs on a mattress are the red, itchy bites they leave behind on the skin. These bites are often mistaken for mosquito or flea bites, but they typically appear in a line or cluster, and can be extremely itchy and uncomfortable. The bites may also become inflamed and swollen, and can sometimes cause an allergic reaction in some people.Red, itchy bites on the skin
If you start to notice small, reddish-brown stains on your mattress, it could be a sign of bed bugs. These stains are actually the bed bugs' fecal matter, which is made up of digested blood. As bed bugs feed on their hosts, they often leave behind these tiny stains on the mattress, sheets, or pillowcases.Small blood stains on the mattress
In addition to blood stains, you may also notice dark spots or stains on your mattress. These could be a result of bed bug excrement, which can also leave behind dark, rust-colored spots on the mattress. These spots may be smaller than the blood stains, and can often be found in clusters or lines.Dark spots or stains on the mattress
Bed bugs release a pheromone that gives off a musty, sweet odor. If you start to notice a strange smell in your bedroom, it could be a sign of a bed bug infestation. This odor is often described as being similar to the smell of coriander or almonds.Musty odor in the room
Bed bugs go through multiple stages of development, shedding their skins as they grow. These shed skins, as well as eggshells, can often be found on the mattress or in the crevices of the bed frame. These are clear signs of a bed bug infestation, as only bed bugs go through this process.Eggshells or shed skins on the mattress
Of course, the most obvious sign of bed bugs on a mattress is actually seeing live bed bugs. These tiny insects are about the size of an apple seed, and can often be found hiding in the crevices of the mattress, bed frame, or headboard. If you see them crawling around, it's a clear indication that you have a bed bug problem.Live bed bugs on the mattress
In addition to stains on the mattress itself, bed bug bites can also leave behind red or rusty stains on your sheets or pillowcases. These stains may be more noticeable than the ones on the mattress, and can be a result of a bed bug being crushed while feeding.Red or rusty stains on sheets or pillowcases
As mentioned before, bed bugs leave behind fecal matter that can often be found on the mattress and bedding. These feces are small, dark, and resemble tiny black spots. If you start to notice these on your mattress, it's a sure sign of a bed bug infestation.Visible bed bug feces on the mattress
As bed bugs go through their molting process, they will leave behind their old exoskeletons. These can often be found on the mattress, and are clear signs of an active bed bug infestation. These exoskeletons may be difficult to spot, but if you start to notice them, it's time to take action against the bed bugs.Bed bug exoskeletons on the mattress
Lastly, if you wake up with bites on your skin that appear in a line or cluster, it's a strong indication of bed bugs. These bites are usually found on exposed areas of the body, such as the arms, legs, neck, and face. If you see these bites, along with any of the other signs mentioned above, it's time to call a professional to help eliminate the bed bugs from your mattress.Bed bug bites in a line or cluster