An allergic reaction to honey can vary from mild to potentially life threatening, depending on the severity of the allergy. Some of the most common signs of an allergic reaction to honey include respiratory symptoms such as coughing or wheezing. Itchy, watery eyes or a runny nose may also indicate the presence of a mild allergy. Skin conditions such as eczema or gastrointestinal disturbances such as vomiting or diarrhea may sometimes occur as a result of this type of allergy. Swelling of the face, lips, or throat may indicate a severe type of allergic reaction known as anaphylaxis and constitutes a medical emergency.

Mild to moderate respiratory disturbances are common when an allergic reaction to honey occurs. This may include typical allergy symptoms such as itchy, watery eyes and a runny nose. Sneezing, nasal congestion, or headaches may also develop. Infections may develop as a result of these symptoms, or the patient may feel foggy-headed. The immune system may become weakened, especially if honey is consumed on a regular basis in spite of the allergy.

Skin changes may occur during an allergic reaction to honey. These changes may include itching and the development of a localized or widespread rash. A raised rash that may itch and burn, known as hives, is commonly found during an allergic reaction. Ongoing use of honey by a person with an allergy to honey may result in a skin condition known as eczema.

Some patients may experience a variety of gastrointestinal disturbances, including nausea, vomiting, or diarrhea as symptoms of an allergic reaction to honey. Abdominal discomfort or cramping may occur as well. Excessive diarrhea or vomiting should be reported to a doctor, and care should be taken not to become dehydrated. Drinking plenty of fluids is usually enough to prevent dehydration, although severe cases of diarrhea or vomiting may require IV fluids in a hospital setting.

Anaphylaxis may occur during an allergic reaction to honey. This is a severe type of allergic reaction that can become fatal within a matter of minutes if emergency medical attention is not obtained. Symptoms of anaphylaxis may involve swelling of the face, lips, or tongue and the development of a rash that may or may not itch. Breathing may become difficult, sometimes causing the patient to lose consciousness. If anaphylaxis is suspected, emergency medical professionals should be contacted, as attempting to transport the patient to the hospital via traditional means could prove fatal.