Hives and Diet: What Really Matters?
One of the most common questions patients ask is:
"Should I avoid seafood?"
"Do I need to cut out eggs or dairy?"
"Should I be tested for food allergies?"
In most cases, the answer is no.
Hives (urticaria) are not usually caused by food allergies. More common triggers include:
-Viral infections, such as a cold
-Stress or lack of sleep
-Certain medications
-Ongoing inflammation or illness
Unless a specific food consistently triggers your hives, there’s usually no need to restrict your diet.
Foods to Be Aware of During a Hives Flare
Most foods don’t cause hives, but some may make an existing flare worse. They generally fall into three categories.
Histamine-rich foods
These foods naturally contain higher levels of histamine and may worsen symptoms in some people.
Examples include:
- Fermented foods (kimchi, miso and natto)
- Aged cheeses
- Processed meats such as ham, bacon and sausages
- Smoked or canned fish
- Alcohol
If a particular food consistently makes your hives worse, consider avoiding it until the flare has settled.
Hives aren't always allergies: when your immune system overreacts Click here to find out more
Histamine is a natural chemical released by the body that causes many of the symptoms of hives, including itching, redness and raised welts. That's why antihistamines are the first-line treatment for hives.
Foods that may trigger histamine release
Some foods are relatively low in histamine but may trigger histamine release or make symptoms more noticeable in certain people.
Examples include:
- Strawberries
- Tomatoes
- Citrus fruits
- Kiwifruit
- Chocolate
The evidence is mixed, and these foods are not a problem for everyone. There’s no need to avoid them unless you’ve noticed a clear and consistent pattern.
Highly processed foods
Some people — particularly those with chronic hives — may be more sensitive to substances known as pseudoallergens.
Examples include:
- Artificial food colourings
- Preservatives
- Benzoates
- Sulphites
- Some artificial flavourings
During a flare, choosing fresh, minimally processed foods may be helpful.
Pseudoallergens Are Not True Allergens
They are substances found naturally in some foods or added during food processing that may worsen hives in some people without causing a true food allergy.
If your hives last for more than six weeks, they are classified as chronic hives.
Unlike acute hives, chronic hives is usually an immune-mediated condition rather than a food allergy. Restrictive diets rarely help. See a dermatologist for evaluation and treatment.
Before your visit "what to record": hives pre-visit record Click here to find out more
