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Bed bug bites (bites in a line or row)

Also called: Bed bug bites, bites in a row, breakfast-lunch-dinner bites

Itchy red bites in a line, row, or cluster, often on skin exposed during sleep, are a classic sign of bed bugs. Bed bug bites are itchy but don't spread disease, and they heal on their own in 1 to 2 weeks. The bigger job is getting rid of the bugs, which usually needs a professional. Fleas and other insects can cause similar bites.

Spread disease?No
Bites heal in1 to 2 weeks
Get care ifSigns of infection or a severe allergic reaction
If you think it's an emergency, call 911.Thinking about suicide? Call or text 988.

Overview

Bed bugs are small, flat, reddish-brown insects about the size of an apple seed. They hide in mattress seams, box springs, bed frames, headboards, and furniture, and come out at night to feed on blood.

Bites are often in a line or cluster of 3 or more on the arms, legs, neck, face, or back. They may itch a lot, and some people don't react at all. Signs of bed bugs include tiny dark spots (droppings) or blood smears on sheets, shed skins, eggs, and live bugs in seams. Flea bites tend to be around the ankles; chigger bites around the waist and sock line.

When to get medical care

Call 911Trouble breathing, swelling of the face, lips, or throat, or dizziness after bites (rare severe allergic reaction).
Get care todayBites that become very red, warm, swollen, or painful, drain pus, or come with fever or red streaks (possible infection).
See a doctor soonMany bites with intense itching that doesn't improve with home care. Blisters or a widespread rash. Bites that keep appearing (you'll need to find the source). Feeling very anxious or unable to sleep because of bites.

Causes

Bites in a line or row are often from bed bugs or fleas. Other causes include chiggers, mosquitoes, spiders, mites, and scabies (which causes tiny burrows and intense itching, especially at night, between fingers and on wrists). Some rashes like hives or contact dermatitis can look similar.

OwieClear has pages on 1 condition that can cause bed bug bites (bites in a line or row). Each shows how soon to get care.

Common causes

  • Bed bugsOften treated at home

    Small insects that bite at night, leaving itchy red bites often in a line or cluster.

What you can do at home

  • Wash bites with soap and water.
  • Don't scratch; keep nails short to avoid infection.
  • Use a cool compress and anti-itch cream like hydrocortisone or calamine.
  • Check your bed: look in mattress seams, box spring, headboard, and nearby furniture with a flashlight.
  • Wash and dry bedding and clothes on the hottest dryer setting for at least 30 minutes.
  • Vacuum mattresses, rugs, and furniture, and seal the vacuum bag in plastic and throw it out outside.
  • Use mattress and box spring encasements made for bed bugs.
  • Call a licensed pest control professional; bed bugs are hard to get rid of on your own. Avoid foggers ('bug bombs'), which don't work well on bed bugs.
  • When traveling, check hotel beds and keep luggage off the floor and bed; wash clothes in hot water when you get home.

Medicines

Oral antihistamines like cetirizine or diphenhydramine and hydrocortisone cream ease itching. Infected bites may need antibiotics. Severe allergic reactions are treated with epinephrine.

At the doctor

The provider will look at the bites and ask about where you've been sleeping.

Questions you may be asked

  • When and where bites appear
  • Whether others in the home have bites
  • Signs of bugs, spots, or shed skins in the bed
  • Recent travel, used furniture, or shared housing
  • Pets (fleas)
  • Itching between fingers or at night (scabies)

The exam

A skin exam.

Tests

  • Usually no tests
  • A skin scraping if scabies is possible

Prevention

You can lower your risk.

  • Inspect hotel rooms and luggage
  • Check used furniture before bringing it home
  • Use mattress encasements
  • Reduce clutter where bugs can hide

Check your symptoms

Most symptoms have more than one possible cause. The symptom checker looks at all of your symptoms together, plus your age, and shows how soon to get care.

Start the symptom checker

Sources

Last updated 2026-11-13.