Beware: the oak processionary caterpillar is active again

Oak trees covered with white webs around the branches: perhaps you've already spotted them this month. This phenomenon is caused by the oak processionary caterpillar. Harmless, until you come into contact with the stinging hairs of this caterpillar. These hairs – invisible to the naked eye – can cause irritation of the skin, eyes, and respiratory tract. It's not without reason that our instructors issue extra warnings about this caterpillar during this period. What should you do if you come into contact with the oak processionary caterpillar?

Where are they found?

Previously, it was mainly a problem in the south and east of the country, but nowadays the processionary caterpillar is increasingly spotted in the west of the country. Due to a changing climate, the oak processionary caterpillar and moth are moving further north. The municipality of Amsterdam is taking preventive measures to combat the oak processionary caterpillar. The processionary caterpillar is often found in summer oaks in wooded areas.

Possible symptoms

Have you or your child come into contact with the oak processionary caterpillar? Then bumps, red eyes, and (severe) itching are possible symptoms. Sometimes the complaints resemble a cold, such as a runny nose, coughing, and difficulty swallowing. However, it can get worse: some people may vomit or experience dizziness and feel unwell.

What should you do?

Are you experiencing the above symptoms or does your child have complaints?

Then remove the clothing containing the hairs and preferably wash it at 60 degrees.

Rinse the skin or eyes thoroughly with lukewarm water and strip the skin where the hairs are with adhesive tape or a sticky plaster. You do this by sticking the adhesive side to your skin and then pulling it off.

Are you experiencing severe itching? Do NOT scratch or rub, as this prevents the spread of the stinging hairs. Cream with menthol, aloe vera, or calendula may provide relief.

In most cases, you will be free of your symptoms within two weeks. Always call 112 in case of a severe allergic reaction! If you have eye complaints, consult an ophthalmologist.

Preventing complaints

Prevention is better than cure. Therefore, it is wise to stay away from trees where you see the white webs. Also, warn your children about this. The oak processionary caterpillar is particularly active in May, June, and July. Are you walking through the forest or driving along roads where the caterpillars are present? Then cover your neck, arms, and legs well. Are the oak processionary caterpillars in your own garden? Have them professionally controlled by an experienced company because the more often you come into contact with the caterpillar, the more unpleasant the symptoms become.

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