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Suggest Treatment For Cold Sores And Blisters On Corner Of Mouth

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Posted on Mon, 23 Mar 2015
Question: My baby girl, 20 months old, looks to have a cold sore or blister on the corner of her mouth -- not exactly on her lip. Can this be caused by herpes? Are there other causes?
doctor
Answered by Dr. Diptanshu Das (12 minutes later)
Brief Answer:
Could be due to Vitamin B deficiency or due to Herpes

Detailed Answer:
Thanks for asking on HealthcareMagic.

Generally such conditions are caused either due to Herpes, or due to Vitamin B deficiency. Try giving your child vitamin supplements like Syrup A to Z once daily for a week or so. If it is due to Herpes, it is likely to be quite painful and may or may not be associated with fever. That would not be the case if it is due to vitamin B deficiency.

Hope that helps.

If you found my answer to be helpful, please close the thread with a positive review and a 5 star rating.

Regards
Dr. Diptanshu Das
Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar
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Follow up: Dr. Diptanshu Das (57 minutes later)
What is the best way to I.D. whether it's herpes. Will the antibodies show up in a blood test even after the cold sore (if it be a cold sore per se; could be a rash) heals?
doctor
Answered by Dr. Diptanshu Das (4 hours later)
Brief Answer:
A better way to diagnose is to get a viral culture from the affected area

Detailed Answer:
Thanks for writing back.

The primary point distinguishing herpes is that it is painful. Although antibodies can show up in the blood even in case of cold sores, a better way to diagnose it is to get a viral culture of the sores.

Going through the following links should help:
http://www.patient.co.uk/doctor/herpes-simplex-oral
http://www.healthline.com/health/fever-blister-causes

Regards
Dr. Diptanshu Das
Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar
doctor
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Follow up: Dr. Diptanshu Das (9 hours later)
I did read through the links & they're most helpful.
But I do have this thought/question.
So there are situations where a rash can appear on the corner of a child's lips besides its being a fever blister/cold sore and a vitamin B deficiency, aren't there? A child could have a rash that's not a cold sore from, say, an allergic reaction to an unfamiliar food, for example. Is that correct?
This is probably my last question.
doctor
Answered by Dr. Diptanshu Das (1 hour later)
Brief Answer:
Cold sores are most often due to Herpes

Detailed Answer:
Thanks for asking back.

The fever or cold sores are most often due to Herpes. Once infected, it remains in the area supplied by the same nerve, for life. Most often we do not even realize it. It expresses itself when the body is weak or immunocompromised. Other than Vitamin B deficiency or allergic reaction, I do not think of any other cause.

Hope that helps.

If you found my answer to be helpful, please close the thread with a positive review and a 5 star rating.

Regards
Dr. Diptanshu Das
Note: For further queries related to your child health, Talk to a Pediatrician. Click here to Book a Consultation.

Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar
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Answered by
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Dr. Diptanshu Das

Pediatrician

Practicing since :2005

Answered : 3877 Questions

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Suggest Treatment For Cold Sores And Blisters On Corner Of Mouth

Brief Answer: Could be due to Vitamin B deficiency or due to Herpes Detailed Answer: Thanks for asking on HealthcareMagic. Generally such conditions are caused either due to Herpes, or due to Vitamin B deficiency. Try giving your child vitamin supplements like Syrup A to Z once daily for a week or so. If it is due to Herpes, it is likely to be quite painful and may or may not be associated with fever. That would not be the case if it is due to vitamin B deficiency. Hope that helps. If you found my answer to be helpful, please close the thread with a positive review and a 5 star rating. Regards Dr. Diptanshu Das