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Nettle Rash

By Bjarne Lühr Hansen PhD, MD and Philipp Skafte-Holm MD, Mentor Institute

Nettle Rash is a strong itchy rash. The nettles are scattered across the body. They disappear within 24 hours, but new nettles are coming all the time. Nettles are a hypersensitivity reaction and may be triggered by medicines, food and infections. In most cases, however, the triggering cause can not be identified. The treatment is allergy medicine (antihistamine). If your lips raise or you are having difficulty breathing, contact a doctor immediately.

Nettle rashes are a strong itchy rash that can occur anywhere on the body. Nettle rashes are very common - 15-20 % of all get a nettle rash at one time.

The rash looks like the skin's reaction to burners. The skin is swollen and bleached - like a nail.
The individual nerves are spread over the body. The nettles can be from few to many centimetres in size. They usually disappear within 24 hours, but new nerves always come to other places on the body. The rash is highly itchy. Most cases of nettle rash disappear within themselves in a few weeks.

The cause of nettle rash is not entirely clear, but it is a type of hypersensitivity reaction. In 80 % of the cases doctors do not know what the patient is unable to tolerate. In children, nettle rash often result from infection with a virus. Medications and foods can cause nettle rash. But also, cold, heat and pressure on the skin can trigger nettle rash.

In rare cases, nettle rash can develop into a serious condition. It happens that the lips and mucous membranes in the mouth increase sharply. Swelling may be so pronounced that breathing is difficult. This is a very serious and urgent treatment-intensive condition. 

What can you do?

Nettle rash are treated with anti-allergy medicines (antihistamines) that can be bought over the counter.
You can try to find the trigger cause and in future avoid this. It may be food or new medication that you suspect. However, as mentioned above, only 20 % of the cases indicate that the triggering cause can be found.

Contact the doctor tomorrow

If itching is severe.
If the nettle rash occur longer than one week.

Contact the doctor immediately

If your lips raise up.
If you have trouble breathing.