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This is How Bedbugs Are Diagnosed

Bedbugs are diagnosed in two ways. The first is the appearance of bites on your body. However, these are very similar to other insect bites and can appear days after being bitten. Finding the signs of bedbugs in your sleeping environment is more conclusive evidence that there is an infestation. You will usually do your own self-diagnosis, but you might see a doctor due to unexplained bite marks or a skin infection after scratching. Learn how to determine whether you have been bitten by bedbugs.

bedbug bites diagnosis
© Verywell, 2018
Self-Checks/At-Home Testing
It is difficult to tell bedbug bites from those of mosquitoes, fleas, or other insects. You likely won’t feel bedbugs biting as they inject an anesthetic and anticoagulant when they bite. You may develop bite marks one to 14 days after being bitten. As with mosquitoes, their saliva can provoke an allergic reaction at the site of the bite. Some people have no reaction, others have a mild one, while some can have significant swelling.

A typical reaction the first time you are bitten is a red, itchy bump, and you may see a central blood dot. When you have repeated bites, your body may react in different ways and the bites can form wheals or blisters.

The bite marks may be in a straight line, cluster, or a random pattern. One classic pattern is three bites in a line—breakfast, lunch, and dinner. Bed bugs are not picky eaters when it comes to location—any exposed skin will do—but they won’t necessarily go farther than they have to. Expect to see bites more often on the face, hands, and feet.

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Close up around ankle of woman with rash cause from bed bugs bite
An ankle with a rash from bed bug bites. Hemjaa / Getty Images
Environmental Checks
The only way to know for sure if your symptoms are, in fact, a result of bed bugs, is to find the bed bug infestation in your room or furniture.

You can check bedding, mattresses, furniture, and crevices in walls for bed bug infestation. Do your inspection just before dawn, which is when they are the most active. The bugs will be larger and slower after feeding. Bedbugs will quickly flee from light, so live bugs are best located in the folds and seams of mattresses and sheets. Bedbugs are about the size of an apple seed, about 1/4 inch long. They change from light brown to purple-red after feeding. You may also see their eggs, which are about the same size as the adults. The eggs will often be in seams, cracks, or crevices.

You are more likely to find their molted exoskeletons and dark specks of their feces. Also look for rust-colored blood spots on bedding and mattresses, which can come from the blood in their feces or from having crushed a bedbug who was feeding. A room with a heavy bedbug infestation might have a sweet, musty odor.

Differential Diagnoses
Most of the time you won’t go to a doctor for bedbug bites. However, the bites can mimic other rashes or you might develop a skin infection from scratching, and those factors may send you to the doctor.

Be prepared with a timeline of your symptoms. You should note any travel you have done, any new furniture, bedding, or mattresses, and a list of your medications and supplements. Bring photos of any suspicious specks found on your bedding or furniture.

Your doctor will perform a physical exam and take your medical history. This is usually enough to make the diagnosis or rule out other causes.

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13 Comments

  1. Reply

    Nice

  2. Reply

    Thanks for the info

  3. Profile photo ofYusuf

    Reply

    Nice info

  4. Reply

    This is really good and interesting to know

  5. Reply

    Okay

  6. Reply

    Educating

  7. Reply

    Thank you for the update

  8. Reply

    really

  9. Reply

    Interesting

  10. Reply

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  11. Reply

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  12. Reply

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  13. Reply

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