Although the use of hawthorn berries should not cause hives, they can develop after you consume any substance if you develop an allergic reaction. If hives appear on your body after taking the hawthorn berry supplement, contact your doctor immediately.
Hawthorn Berries
Hawthorn berries are small berries found on the hawthorn bush. The bush grows to about 5-feet tall on hillsides in sunny areas. Hawthorn berries have been used for centuries to treat various medical conditions, according to researchers at the University of Maryland Medical Center. The herbal supplement is commonly used to treat atherosclerosis, and to regulate heart rhythm and blood pressure, according to Drugs.com. Do not use this supplement without first talking with your doctor to prevent any complications or drug interactions.
Hives
Hives are red welts that develop with defined borders in different shapes and sizes. The rash can develop anywhere on your body and can change location. The welts are raised above the layer of your skin and have a flat top surface, according to PubMed Health. They tend to be extremely itchy and will spread when scratched. The welts can join together, forming larger welts, and will develop a white center when you apply pressure. Hives are typically harmless, unless they develop in your throat.
Cause
Hives that develop after you consume hawthorn berries are an allergic reaction. An allergic reaction occurs when your immune system doesn't recognize the proteins in the supplement. The body releases various chemicals, such as immunoglobulin E and histamine. Histamine causes your blood vessels to dilate, leading to more blood flow, which triggers inflammation and swelling. Histamine released near the surface of your skin can cause hives to develop.
Treatment
Your doctor will determine the most effective treatment for your condition. If you're diagnosed with an allergy to hawthorn berries, you will need to stop using the supplement. Hives that form from a common allergic reaction may be treated with an oral antihistamine and topical steroid lotion. If hives develop along with other severe allergic reaction symptoms, such as shortness of breath, a racing heart rate and a drop in blood pressure, you may need an injection of epinephrine, a prescribed medications that reduces swelling and restores normal breathing.



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