How to differentiate between bed bug bites and allergies?

Question

Hi doctor,

My question is about the identification of possible bug bed bites. I noticed them on the torso bilaterally along the midline of both flanks.

Thank you.

Answer 1

Hi,

Welcome to icliniq.com.

I have reviewed the photo and details (attachments removed for the patient's identity protection). I hope the lesions are limited to only flanks, as mentioned. These may be due to irritation or allergies, or even bug bites.

Avoid irritants or allergens. If your skin is dry, please use moisturizing creams (moisturizing soaps or cleansers) that you are comfortable with. Avoid harsh soaps. Please take antihistamines like cetirizine if too itchy. It might also be due to scabies or itch mites if itching is more at night and near wrists, web spaces, or groins. Observe for a few days.

If it persists, consult your doctor or dermatologist for further examination and management.

Thank you.

Answer 2

Hi,

Welcome back to icliniq.com.

Thank you for the follow-up query.

Usually, the lesions of allergies or bites can overlap, and clear distinction may be difficult many times. History of allergies, travel history, and examination may be of help. Distribution of lesions may also help. Insect bite lesions may have a central punctum at the site of lesions. But many times, it may not be clear.

Examination, dermoscopy, or biopsy may be of help.

If it resolves after this travel and do not appear again unless exposed to it again, then bugs may be possible. If recurrent often, then it may be due to allergies.

Thank you.