Pictures, Signs and Treatment of Bed Bug Bites

overview

Bed bug bites are an allergic skin reaction caused by fluids excreted when the insect punctures the skin. Most people show no skin reaction. People that do have a reaction get small red pus filled bumps on the skin.  In chronic cases it can cause skin swelling, wheals or even blisters. Reactions can be seen within 30 minutes or in rare cases days later.  Bed bugs do not transmit disease, so bug bites are more of an unpleasant source of discomfort.

Treatment for most people is as simple as treating any itch and letting the body heal itself. Bites should clear on their own in 3 to 5 days. In severe cases the bites cause hives, skin blisters and welts. Reactions can appear days after the bite occurs.  Each bite episode can vary with skin reactions worsening each time it happens.

how many bites a night

There is no limit to the number of bites you can get each night. If you are sleeping in a bed that is infested, then hundreds of bed bugs could feed on your blood. If there is a small infestation, then expect a smaller number of bites. As you can see from the picture below, this young girl has hundreds of bites.

Hundreds of Bed Bug Bites on Young Girl

Hundreds of Bed Bug Bites on Back and Arm

A Bed bug bites in order to feed on the blood of a human host. A single bug may bite several times in one place on
the body. If the bugs are in a specific hiding place and your body comes in contact with where they are hidden, such as a seam in the bed, then that area that comes in contact with the seam will be filled with bites in a straight line along the seam.

Different people will have a wide range of allergic reactions to the bite. This includes a minimal reaction to something more severe. Over time, the body tends to have a stronger reaction.

bite patterns

Single or groups of bites are common. Frequently, you see 3 bites in a triangle which could be caused by one or multiple bed bugs.

Three Bites in a Triangle Bed Bug Bite Pattern

3 Bed Bug Bites in a Triangle3 Bed Bug Bites in a Triangle Pattern

Bed Bug Circle Bite Pattern on Arm

Bite Wheal Reaction

Wheal Shaped Bed Bug Bite Skin Reaction

where bed bugs like to bite

Bed bugs like to bite bare skin areas.  This is why bites are frequently seen on the lower arms and legs. One strategy to avoid being bitten on the legs is to wear socks over the bottom of pajamas.

They will also bite under lose fitting clothing if it is easy to find skin.

They tend to avoid the face and the bottoms of the feet.  Bed Bugs do not bite through clothing.

How a bed bug bite feels

Bed Bug Puncturing Skin (biting) With Stylet

Bed bugs do not actually bite.  They puncture the skin. When a bedbug punctures the skin with the stylet or beak, the host will feel a light pinch if anything. When the bug bites, it transfers saliva into the human or animal host.

You are more likely to not feel the actual bite, but feel the "itch" or allergic reaction your body has to the bite.

How does a bed bug bite?

A bed bug has two tubes on its mouth which are inserted into the host. One of the two tubes inserts saliva into the host and the other draws blood. Feeding lasts for approximately 5 minutes. A bed bug prefers to feed on blood every 5 to 10 days, but can last up to a year without feeding.

When do bed bug bites occur?

Bed bugs prefer to bite or feed on a host at night or just before dawn. They avoid sunlight when possible.

what do bed bug bites look like?

Two Bed Bug Bites on Arm

Two Bed Bug Bites on Arm 1 Week After Being Bitten

Bedbug bites can look like the bites of other insects such as mosquitoes, spiders and chiggers and also look like the marks caused by several diseases such as chicken pox.

The bites take on different forms based on the reaction. It could look like a circle or "wheal" or a series of small blisters. There are certain bite characteristics that help you distinguish between bed bug bites and other causes:

  • Itch: bed bugs bites usually itch, which is the body's reaction to the saliva from the insect.
  • Location: bed bugs usually bite on exposed areas such as the arms, neck and even the shoulders. They do not tend to bite on the bottom of the feed (this can be scabies)
  • Pattern: clusters of bites can be in a line or a triangle
  • Appearance: the bites are not red at the center, but in a wheal around the bite. The area of the bite can be swollen.

Notice in the picture of bedbug bites and how some bites are in a line, possibly along a vein, and others are random, based on where the bugs may have been hiding in a seam on a mattress. It is possible for different types and patterns of reactions to be found after being bitten.

Symptoms

Bullous Bed Bug Skin Reactions

bed bug bite reactions on hand and legBullous Bed Bug Bite Eruptions on Hand and Leg

Some, actually most people are not allergic to bedbug bites and will show no skin reaction. Others will have a reaction 1 hour to 2 days later. It is even possible to have the first reaction 2 weeks later.

The usual reaction is skin welts, bumps and in some cases, the skin form blisters that contain puss. Hives can also form that when measured can be up to 8 inches. It is rare for a more severe allergic reaction called anaphylactic shock, where the airway can become constricted and even cause death.  Skin itch is also a common reaction.

Diffused Erythema Possible Caused by Scratching Bites

erythema skin reaction from scratching bed bug bitesDiffused Erythema in Severely Bitten Areas Probably Caused by Skin Scratching by Patient

how to tell if bites are caused by bed bugs

The bed bug bite looks like the bites of other insects such as scabies, lice, mosquitoes and fleas. For this reason, a Doctor will not know if a bite is caused by a bed bug just from the appearance. To confirm that bed bugs are a problem, look for other problems such as dark stains on a mattress or an actual insect.



bed bug caused mattress stainsTo Confirm Bites are Caused by Bed Bugs Look for Addtional Signs Such as Mattress Fecal Marks

bite Treatment & how to stop the itch

For most people, bedbug bites do not need to be treated. Itch should go away in 1 to 3 days with the use of an anti-itch cream like cortisone. If the reaction to the bed bugs looks like it is severe then see a Doctor for a corticosteroid or an antihistamine.

Do not scratch the ares bitten in order to avoid infection. You could also try an anti-itch cream like Aveeno or calamine lotion. The key is to use a cream to calm the skin and then treat any infection with antibiotics if necessary.  Treat bites as you would the bites of any other insect.

killing bed bugs in your home or apartment

Bed bug bites will only end when the insects are removed from your home or apartment.  Killing bedbugs is not easy, since they remain hidden in cracks until they come out at night. 

Hire an Exterminator

The best approach is to call in a bed bug pest control professional, who has the knowledge and experience to do an inspection, assess the extent of the bed bug problem and then recommend a treatment plan.  

We suggest getting a free quote from a reputable exterminator from Home Advisor (call 866-214-8380) or search our exterminator database to find a qualified local bedbug exterminator near you from our list of qualified experts.  

Please keep in mind that if the bed bugs are not treated correctly, insects missed will begin to multiply and the problem will return.  Don't use a pest control company unless they have extensive experience treating bed bugs.

Make sure the  firm you select provides a guarantee since 2 to 3 treatments may be needed.  It is easy to miss bedbug eggs that hatch after the initial treatment was completed.

Do It Yourself

For smaller infestations and to do it  yourself we recommend purchasing a bed bug kit. Multiple products are needed to remove both the bed bugs and their eggs. 

For more information see our guide on getting rid of bed bugs.

brochures

Each of these free brochures provides additional information on bed bug bite symptoms, patterns and treatment.

How to recognize bed bugs bites.
Available in a free Ebook

Pictures and descriptions of bite reactions.
Available in a free Ebook

Questions and answers

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references

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