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EcoGuard Pest Management
Boxelder bug with distinctive black and orange markings on a leaf
By Gary Anderson||7 min read

Do Boxelder Bugs Bite Humans?

Learn the truth about these common nuisance pests and whether they pose any real danger to you and your family.

Boxelder bugs are primarily considered nuisance pests rather than harmful ones. Despite their ability to bite, they rarely do so. These black and orange insects are commonly found on and around boxelder trees and can be found throughout the United States where these trees are present.

They often enter homes, sheds, and garages to overwinter. While their mouthparts are capable of piercing human skin, boxelder bugs generally do not bite humans and are more focused on feeding on the seeds and foliage of boxelder trees.

Quick Answer

Boxelder bugs rarely bite humans. While they have piercing-sucking mouthparts that can occasionally puncture skin, bites are uncommon and cause only mild, temporary irritation. They do not carry diseases and are considered nuisance pests.

Quick Facts

Size
3/8 to 5/8 inches long
Bite Risk
Rare, mild irritation only
Disease Risk
None - do not carry diseases

What Are Boxelder Bugs?

Boxelder bugs are scientifically known as Boisea trivittata. They are almond-shaped insects characterized by their black bodies with reddish-orange markings along their wings and thorax.

Identification

  • 3/8 to 5/8 inches in length
  • Black bodies with reddish-orange markings
  • Almond-shaped body
  • Distinctive wing pattern

Habitat & Diet

  • Found on boxelder and maple trees
  • Feed on leaves, flowers, and seeds
  • Primarily reside outdoors in summer
  • Seek indoor shelter in autumn

Behavior

  • Group together on sunny surfaces
  • Enter homes to overwinter
  • Do not reproduce indoors
  • Nuisance for homeowners in fall

Are Boxelder Bugs Harmful?

Boxelder bugs are primarily considered nuisance pests and are not harmful to humans or pets. They possess mouthparts that are primarily capable of piercing plant tissues, and they rarely bite humans because they are not equipped to cause significant harm.

Not Dangerous

  • Do not carry diseases
  • Rarely bite humans
  • Not equipped to cause significant harm
  • No venom or stingers

Nuisance Issues

  • Fecal material can stain fabrics
  • Emit foul odor when crushed
  • Can be bothersome indoors
  • Congregate in large numbers

Do Boxelder Bugs Bite?

Boxelder bugs are not known for biting humans, but their piercing-sucking mouthparts can occasionally puncture the skin and cause mild irritation. Bites are rare and symptoms are typically minor.

Symptoms of a Boxelder Bug Bite

Redness & Swelling

Localized at bite site

Mild Itching

At the affected area

Minimal Pain

Slight, fleeting discomfort

Quick Resolution

Within a few hours

What to Do If Bitten

Cleanse the Site

Use lukewarm water and mild, unscented soap to gently clean the bite area, removing any residual irritants.

Soothe with Cold

Apply a cool compress or properly wrapped ice pack for 10 to 15 minute intervals to alleviate swelling or itching.

Topical Relief

For persistent itching, apply non-prescription anti-itch cream like hydrocortisone or calamine lotion.

Resist Scratching

Scratching can lead to skin damage and increase infection risk. Try patting or applying gentle pressure instead.

When to Seek Medical Attention

Although extremely uncommon, some individuals may experience more severe reactions. Seek immediate medical care if you develop difficulty breathing, facial swelling, or an extensive rash, as these could indicate a serious allergic response.

Can They Pose a Danger Without Biting?

Even without biting, some individuals have reported mild irritation after contact with boxelder bugs, likely due to a mild allergic reaction to chemicals they produce. These reactions typically manifest as minor skin irritation or redness but are not considered dangerous.

Boxelder Bugs Invading Your Home?

Our professionals safely remove boxelder bugs and seal entry points to prevent future invasions.

Call (866) 326-2847

Threats to Pets and Property

Are They a Threat to Pets?

Boxelder bugs are generally harmless to household pets because they lack venom and stingers. However, if a pet eats a boxelder bug, the insect's unpleasant taste can cause vomiting.

While this reaction is generally not serious, their nasty taste discourages repeated encounters.

Are They a Threat to Property?

Boxelder bugs are not a significant threat to property, but they can cause minor issues when they congregate indoors.

  • Fecal matter can stain light surfaces, drapes, upholstery, and clothing
  • Emit unpleasant odor when disturbed or crushed
  • May cause minor cosmetic damage to fruit outdoors

Will Boxelder Bugs Find Their Way Inside?

During the winter months, boxelder bugs often find their way inside homes in search of warmth. They tend to group together on surfaces exposed to the sun. When it starts to get cold in the fall, these large groups seek out shelter.

Windows & Doors
Ceiling Lights
Soffits & Vents
Gaps in Siding

Prevention and Removal

How to Prevent Boxelder Bugs

Remove Hiding Places

Clear debris from around the house including mulch under shrubs, rocks, woodpiles, and leaves.

Repair Screens

Fix holes in window and door screens to block entry points.

Seal Cracks & Gaps

Use silicone or silicon-latex caulk to seal cracks and crevices in foundations and walls.

Install Door Sweeps

Add door sweeps on all exterior entrances to prevent bugs from crawling under doors.

How to Get Rid of Boxelder Bugs

Vacuum Them Up

Remove visible bugs with a vacuum to avoid crushing them. Crushing can leave stains and release an unpleasant odor. Dispose of the vacuum bag immediately.

Outdoor Control

For outdoor control, consider removing boxelder trees if practical, or use insecticide sprays on trees and exterior walls where bugs congregate.

Professional Pest Control

If the infestation is severe or persistent, contact a professional pest control service to ensure effective and safe removal.

Contact EcoGuard if You Are Dealing with Boxelder Bugs

If you are dealing with a boxelder bug infestation and finding it challenging to manage on your own, EcoGuard Pest Management is here to help. Our experienced professionals use safe and effective methods to eliminate these nuisance pests from your home and prevent future invasions.

Call (866) 326-2847Get Free Quote

Boxelder Bug FAQs

What happens when a boxelder bug bites you?

While uncommon, boxelder bug bites on humans may occur. When they do, the typical reaction is mild, often manifesting as a slight skin irritation, redness, and a small, raised bump reminiscent of a mosquito bite. These incidents rarely pose serious health concerns. Nevertheless, if you notice any unexpected or severe reactions following a suspected bite, it is prudent to consult with a healthcare professional for proper assessment and guidance.

Do boxelder bugs make you itch?

Boxelder bugs themselves do not typically cause itching, but if they bite, it may lead to mild irritation. Most people will not experience significant discomfort, but any itchiness would be similar to that from a minor insect bite.

Are boxelder bugs dangerous to humans?

Boxelder bugs are generally not harmful to humans as they do not bite or sting frequently and do not carry diseases. While they can be a nuisance and may cause minor irritation or staining, they pose no serious health threat.

Can you touch boxelder bugs?

You can touch boxelder bugs, but it is best to avoid direct contact. While they are not harmful, handling them may cause minor irritation or leave residue on your hands.

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