Can food allergies cause jaw pain?

No. The most common symptmos with food allergies are rash(facial or generalized), nausea, vomiting, diarrhea, coughing, wheezing, shortness of breath, runny nose, swelling of throat tongue or lips, within minutes to a few hours after ingesting the offending food. Pain in the jaw after eating, especially chewy, crunchy food, may signify tmj( temporomandibular joint disease). Would discuss with your doc.
Rare. Allergies don't commonly cause TMJ, but the two can be linked, particularly in children. Allergies that cause nasal congestion in a child could lead to TMJ syndrome; however, this is uncommon.
Not normally. Food allergies are not inherently a cause of jaw pain. But due to the type of foods you may have to limit yourself to, it may create a change in your eating habits. Such habits can affect the consistency of the foods that you eat, affecting the chewing. Also, if your immune system is compromised due to the allergies, you might be more susceptible to minor issues that escalate into the pain.