Do Bed Bug Bites Cause Hives?

by Britany
(San Diego, CA, USA)

I have four little bites that just appeared out of nowhere in my wrist and about 3 bitemarks on my back that are small, red and swollen, not even sure they are bed bugs because i've never had a problem. But I have also noticed large welts of hives appearing on the back of my arm and my whole body itches.

Could the two be related?

Thoughts From Our Editor on Causes of Bite Marks on Wrist and Back Along With Hives

Hi Britany,

I’m sorry to hear about the bites and the itching— here are a few suggestions.

Could This Be Bed Bugs?

The small red, swollen bites on your wrist and back might be from bed bugs, especially if they appeared overnight or in the morning. Bed bug bites are typically small, itchy, and often occur in a cluster or line, as the bugs tend to bite multiple times while feeding. However, if you’ve never had issues before, it’s worth considering some other possible causes.

What About the Hives and Full-Body Itching?

The large welts and widespread itching could indicate an allergic reaction, which might or might not be related to the bites.

Possible Causes Include:

Allergic reaction to bed bug bites: Some people have strong allergic responses to bed bug saliva, leading to larger welts or hives.

Other causes: Skin irritants, food allergies, or even stress can trigger hives.

Since you’re experiencing itching across your whole body, it could point to something systemic rather than just localized bites.

Steps You Can Take:

Inspect for Bed Bugs:

Check your mattress, bedding, and nearby furniture for signs like tiny rust-colored stains, dark spots, shed skins, or live bugs. Use a flashlight and look along seams and crevices.

Address the Hives:

If the itching persists or worsens, consult a dermatologist or allergist. Over-the-counter antihistamines (like Benadryl) can help reduce hives and itching temporarily.

Monitor Symptoms:

Track when and where new bites or welts appear, as this can help narrow down the cause.

Could the Two Be Related?

It’s possible that the bites triggered an allergic response, which is causing the larger hives and itching. Alternatively, they could be coincidental, with the hives stemming from another source (like an irritant or allergen).

What’s Next?

If you don’t find evidence of bed bugs and your symptoms persist, it’s a good idea to get professional help—both from a pest control specialist and a healthcare provider. It’s always better to be cautious and rule out potential causes.

Take care,

Jeff
Editor and Publisher
Bed Bugs Handbook