HomeAnswersDermatologyinsect biteWhy did I get red and non-itchy bumps after a mosquito bite?

What are these red, non-itchy bumps, which started after a mosquito bite?

Share

The following is an actual conversation between an iCliniq user and a doctor that has been reviewed and published as a Premium Q&A.

Answered by

Dr. Suvash Sahu

Medically reviewed by

iCliniq medical review team

Published At June 17, 2016
Reviewed AtNovember 2, 2023

Patient's Query

Hi doctor,

I have red bumps, which are non-itchy and keep on spreading. Also, I am attaching the picture for your reference. Please explain me.

Answered by Dr. Suvash Sahu

Hi,

Welcome to icliniq.com.

I have read your query and examined your picture (attachment removed to protect patient identity).

I want to ask a few questions.

  1. For how long you are having these red non-itchy bumps?
  2. Are they localized to one arm?
  3. Are they painful?
  4. Have you applied anything over these eruptions?
  5. Any past history of similar kind of eruptions?
  6. Are you on any supplements or medicine?
  7. Is there any history of insect bite or mosquito bite?

These are all the questions required for making your diagnosis. With that much of the descriptions I can say it may be allergic contact dermatitis or insect bite hypersensitivity or urticarial vasculitis. I suggest you use Lacto Calamine lotion local application twice daily and one tablet Levocetirizine once daily for five days. Consult your specialist doctor, discuss with him or her, and take the medicine with their consent.

Patient's Query

Thank you doctor,

One week before it started with a mosquito bite. It has spread and is only on the left upper arm. They are not painful or itchy and I have applied a steroid cream that was prescribed to me for another reason. I have never seen this before and I am not on any supplements. My current medication includes Januvia Synthroid and Herceptin for every three weeks. I have never had this kind of reaction from mosquito bites before. Please help me.

Answered by Dr. Suvash Sahu

Hi,

Welcome back to icliniq.com.

You are on Herceptin for the adjuvant for early breast cancer and Januvia Synthroid for diabetes. Your lesions clinically look like IBH (insect bite hypersensitivity) or may be rarerpossibilities of herpes zoster. In IBH previously you would not feel anything on the bite of the insect or mosquito, but later on due to sensitization these reactions occur. I suggest you to stop the application of Steroid immediately and just continue Lacto Calamine lotion twice daily and Levocetirizine as advised for five days. You need to observe if there is any group of vesiculation (fluid-filled eruptions) involved. The dermatome associated with pain localized to that dermatomes then it could be herpes zoster.

It looks rarer possibilities, but cannot be ruled out because you have diabetes and on immunosuppressive therapy. Review after five days with following picture.

Same symptoms don't mean you have the same problem. Consult a doctor now!

Dr. Suvash Sahu
Dr. Suvash Sahu

Dermatology

Community Banner Mobile
By subscribing, I agree to iCliniq's Terms & Privacy Policy.

Ask your health query to a doctor online

Dermatology

*guaranteed answer within 4 hours

Disclaimer: No content published on this website is intended to be a substitute for professional medical diagnosis, advice or treatment by a trained physician. Seek advice from your physician or other qualified healthcare providers with questions you may have regarding your symptoms and medical condition for a complete medical diagnosis. Do not delay or disregard seeking professional medical advice because of something you have read on this website. Read our Editorial Process to know how we create content for health articles and queries.

This website uses cookies to ensure you get the best experience on our website. iCliniq privacy policy