Bloodstains are different than fecal spots. Brownish red or brown bloody spots that are found on bed sheets, clothes and pillows are from both the bed bug and the victim. When a person is bitten they will generally have a small amount of bleeding from the area where the bed bugs beak has entered. The bed bug will often drip some blood out of its rear end before completing its feeding.
If you find stains of blood on bedding it does not always mean you have a bed bug problem. Other liquids can be spilled to leave similar color stains and not all bloodstains in a bed are the result of bed bugs. Being that bloodstains are difficult to clean from bedding, it makes it easier to determine their age. It is also possible to find blood spots on the wall, usually bedside. These can be from people crushing bed bugs that have recently fed.
4) Fecal Spots.
When the blood is digested in the stomach of the bed bug, it comes out as black feces, semi-liquid. As it dries, it will leave behind a slightly raised black spot. Fecal spots left by bed bugs may resemble those left by certain cockroaches, but they have a smooth feel as opposed to a rough texture. If the fecal spot is from a bed bug, when dampened, it will smear. Fecal matter from a cockroach will not.
In an infested area, you will often find fecal spots along mattress seams. These spots are good for isolating the area where the bed bugs are active to give potential treatment. That being said, fecal spots may be long lasting and can represent a previous infestation, just like bloodstains.
5) Bed Bug Eggs.
Bed bug eggs are tiny, clear white and hard to detect, especially when they are inside or between cracks, crevices, or holes or laid on surfaces with light colors. Each day a female bed bug will lay 1 to 3 eggs that will hatch in approximately a week to ten days. The eggs are sticky and will attach easily to rough surfaces. Typically, eggs are found clumped together in infested areas, but since females often travel, more isolated eggs can be found further away from the bed. These isolated eggs are extremely hard to find, often hidden in very small areas, like a screw hole, or behind a paint chip.
Active Bed Bugs can be confirmed by healthy eggs, or at least the potential for active bed bugs once the eggs hatch. The only sure way to know if the egg is vaiable is when it hatches, but there are indications if an egg is healthy. Healthy eggs are plump and white, not dry of shriveled. If the egg is viable, approximately Two or three days before it hatches, two bright red eye spots will become visible near the top of the egg. If the egg has already hatched, the top will be open, empty inside and may appear crumpled.