6 doctors weighed in:

I get canker sores after eating chocolate. Is it possible that I am allergic to chocolate?

6 doctors weighed in
Dr. Javier Chinen
Pediatrics - Allergy & Asthma
1 doctor agrees

In brief: Yes, possible

Allergic reactions are most known to be of immediate nature, most dangerous because they can cause anaphylaxis with respiratory involvement.
Less known are other types of 'allergies', which might produce inflammation of skin, lip, mucosas or other parts upon contact. Elimination diets with supervised challenge is one way to find out, traditional allergy testing might be negative.

In brief: Yes, possible

Allergic reactions are most known to be of immediate nature, most dangerous because they can cause anaphylaxis with respiratory involvement.
Less known are other types of 'allergies', which might produce inflammation of skin, lip, mucosas or other parts upon contact. Elimination diets with supervised challenge is one way to find out, traditional allergy testing might be negative.
Dr. Javier Chinen
Dr. Javier Chinen
Thank
David Miller
Family Medicine
1 doctor agrees

In brief: Not likely

Food allergies tend to present like other allergies, with hives and anaphylaxis, not canker sores, which most frequently are caused by physical trauma (toothbrush, self bite, hard/sharp foods).
There may also be a link to citrus fruits &/or vitamin deficiencies.

In brief: Not likely

Food allergies tend to present like other allergies, with hives and anaphylaxis, not canker sores, which most frequently are caused by physical trauma (toothbrush, self bite, hard/sharp foods).
There may also be a link to citrus fruits &/or vitamin deficiencies.
David Miller
David Miller
Answer assisted by David Miller, Medical Student
Thank
Dr. Lon Kessler
Dentistry

In brief: Yes

In some cases that is a possibility.
I would confirm with an allergist.

In brief: Yes

In some cases that is a possibility.
I would confirm with an allergist.
Dr. Lon Kessler
Dr. Lon Kessler
Thank

In brief: No

Canker sores are not a sign of an allergy, however you may be sensitive to an ingredient in the chocolate.
Preservatives, especially sls or sodium lauryl sulfate have been shown to increase the occurrence of canker sores in sensitive individuals.

In brief: No

Canker sores are not a sign of an allergy, however you may be sensitive to an ingredient in the chocolate.
Preservatives, especially sls or sodium lauryl sulfate have been shown to increase the occurrence of canker sores in sensitive individuals.
Dr. Edward Zuckerberg
Dr. Edward Zuckerberg
Thank
Read more answers from doctors