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Dr. Andrew Rynne
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Dr. Andrew Rynne

Family Physician

Exp 50 years

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What Causes Itchy Rash On Neck, Chest And Abdomen Post Root Canal Treatment?

I had root canal treatment a month or so ago. Since then I have been getting intermittent itchy skin and rash, exacerbated by heat, (eg after a shower). If I scratch the skin it gets very red and develops welts, looks very allergic but I don`t know what is causing it. Mostly neck, chest and abdomen areas. Is it an allergy to the root canal treatment products?
Tue, 23 Jun 2015
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Dentist,  's  Response
Hi Dear,

Welcome to HCM.

Understanding your concern.

Thanks for your query . There can be two reasons for allergic reaction after root canal treatment.

- Firstly the allergic reaction can be due to material use in root canal like gutte percha and formaldehyde solution.

- Secondly it can be due to local anesthesia used during the procedure . Benzocain present in local anesthesia can cause allergy, which last from one day to few days .

I would suggest you to :-

- Keep yourself hydrate by drinking lots of fluid .

- Take benadryl to relieve the symptoms .

- Take rest.

Consult your dentist without any delay , because person can go into anaphylactic shock . Doctor will take history and may order blood test for allergy to rule out other causes like spread of infection after the procedure.

If doctor find that allergy is due to material used in root canal then he/she may extract the tooth or use alternate material. Doctor may also prescribe antibiotics.

Hope your concern has been resolved.

Best Wishes,
Dr. Harry Maheshwari
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What Causes Itchy Rash On Neck, Chest And Abdomen Post Root Canal Treatment?

Hi Dear, Welcome to HCM. Understanding your concern. Thanks for your query . There can be two reasons for allergic reaction after root canal treatment. - Firstly the allergic reaction can be due to material use in root canal like gutte percha and formaldehyde solution. - Secondly it can be due to local anesthesia used during the procedure . Benzocain present in local anesthesia can cause allergy, which last from one day to few days . I would suggest you to :- - Keep yourself hydrate by drinking lots of fluid . - Take benadryl to relieve the symptoms . - Take rest. Consult your dentist without any delay , because person can go into anaphylactic shock . Doctor will take history and may order blood test for allergy to rule out other causes like spread of infection after the procedure. If doctor find that allergy is due to material used in root canal then he/she may extract the tooth or use alternate material. Doctor may also prescribe antibiotics. Hope your concern has been resolved. Best Wishes, Dr. Harry Maheshwari