Ouch — and what now?

Symptoms: How can I recognise a wasp sting?

A wasp sting can be identified by several characteristic symptoms. Unlike a bee sting, where the stinger with its barbs remains in the skin, the wasp withdraws its stinger after stinging and can sting multiple times. Immediately after the sting, a strong, sharp or burning pain is felt, which is clearly different from the itch of a mosquito bite.

At the site of the sting there is typically redness and swelling, and in sensitive skin also wheals. The swelling can reach a diameter of up to 10 centimetres and usually subsides within a day. However, stings in sensitive areas such as the eyes, lips or neck can be more severe and in rare cases may cause breathing difficulties.

In more severe cases, especially with multiple stings, systemic reactions can occur: nausea, vomiting, headache, drop in blood pressure, cramps up to loss of consciousness. More than 20 stings require immediate medical assistance.

Do some wasp stings hurt more than others?

Whether and how much a wasp sting hurts depends mainly on individual pain sensitivity and immune response. In general, wasp stings are painful, but some people experience the sting more intensely than others — especially if they are allergic to insect stings.

The site of the sting also matters: on sensitive body areas such as the face or mouth, stings can hurt more due to greater swelling and can even become dangerous because swollen airways can make breathing difficult.

Interestingly, some wasp species, such as the ant wasp, cause particularly painful stings — even more than the hornet. Their sting is often described as especially burning because the venom has a caustic effect.

What is a normal reaction to a wasp sting?

A wasp sting often causes a typical skin reaction that is unpleasant but usually harmless. Initially there is redness and formation of an oedema at the sting site, which may enlarge during the first hours.

A characteristic symptom is itching, which tempts scratching but should be avoided because it can worsen the irritation. Occasionally there may also be a feeling of warmth, a slight burning or numbness in the affected area. These signs are normally not serious and disappear by themselves after one to two days. They can usually be relieved with simple measures such as cooling or home remedies.

In rare cases, people with an insect venom allergy can develop life‑threatening reactions such as anaphylactic shock after a wasp sting.

What causes a wasp sting allergy?

A wasp sting allergy is caused by specific proteins in the wasp’s venom. In some people the immune system forms specific antibodies after first contact with these proteins, recognising the venom as a threat. On another sting, the body reacts hypersensitively.

This immune reaction can lead to typical complaints such as redness and widespread wheals, shortness of breath, dizziness up to life‑threatening anaphylactic shock. A notable feature of this reaction is that it usually occurs quickly and reaches its peak about 30 to 60 minutes after the sting. Symptoms generally subside after about 24 hours.

If a wasp venom allergy is suspected, it is advisable to call the emergency services immediately after a sting and for diagnosed sufferers to carry an emergency kit so they can act quickly.

Desensitisation, also called specific immunotherapy, can significantly improve the quality of life for allergy sufferers by reducing sensitivity to wasp stings.

What helps with an allergic reaction to a wasp sting?

Quick action is crucial in the case of an allergy to a wasp sting. People who already know they are allergic should have a doctor‑prescribed emergency kit at hand. A typical emergency kit contains an adrenaline auto‑injector for acute, life‑threatening cases, an antihistamine in tablet or drops form and a cortisone preparation. Adrenaline helps to stabilise blood pressure and open the airways, easing the circulatory system.

In milder cases an antihistamine can help relieve itching and reduce swelling, while cortisone further dampens the immune response. A cortisone‑containing ointment can be applied directly to the sting if required to calm the skin reaction. As the medication takes some time to work, it is important to use it immediately after the sting.

For severe reactions or if the affected person develops strong breathing problems, immediate administration of adrenaline and calling the emergency services is essential, as adrenaline can be lifesaving.

Wasp sting: when should you see a doctor?

In most cases a wasp sting is harmless: the swelling remains around ten centimetres, subsides after 24 hours and often turns into a mild itch. If the swelling gets larger, lasts more than a few days or is accompanied by additional symptoms such as severe discomfort or skin reactions, a doctor should be consulted.

A doctor’s visit is particularly important if the sting occurred in the mouth or throat, because the swelling there can block the airways and in the worst case lead to breathing difficulties — in such cases an emergency call is recommended.

If someone is stung by a wasp for the first time and has unusually strong or long‑lasting symptoms, they should be tested for a possible allergy. A doctor can determine whether a wasp venom allergy is present up to a week after the sting — a precaution that can be lifesaving for about 3.5% of allergy sufferers.

What to do if a wasp stings you in the mouth?

If a wasp stings in the mouth quick action is crucial, as swelling of the mucous membranes can rapidly block the airways. First aid consists of sucking ice cubes or ice cream immediately and applying cooling compresses to the neck to reduce the oedema. Even if there is no known allergy, an emergency doctor should be contacted after a sting in the mouth area as the risk of breathing problems is high.

For allergy sufferers a wasp sting in the mouth can be particularly dangerous and even lead to respiratory failure or circulatory collapse. An allergy emergency kit with adrenaline (EpiPen), cortisone and antihistamines can be lifesaving in such situations. Adrenaline helps to open the airways and stabilise circulation.

To avoid wasp stings in the mouth, it helps to pour drinks into glasses and handle bottles and cans carefully, as wasps often get into them unnoticed. Children are advised to drink in summer from closed containers with a straw, since their larynx swells more quickly and thus the risk is higher.

Can you suck out the venom of a wasp sting?

Sucking out wasp venom is not recommended, as there is a risk that the venom will enter the body again via the mucous membranes and intensify the effect. If an attempt is nevertheless made to suck out the sting, the toxin should be spat out immediately afterwards.

A safer method is to use a special suction device from the pharmacy. This can withdraw the venom without it re‑entering the body — a simple and effective alternative.

Wasp stings: quick tips to stay pain‑free and safe

• Cool the sting site. Cooling is a simple and effective way to relieve pain and swelling after a wasp sting. Wrap an ice pack or some ice in a cloth and apply it for 10–15 minutes to the affected area. Repeat as required with at least 15 minutes’ break in between.
• A cut onion can help reduce pain and swelling because its juice has anti‑inflammatory properties. Place a fresh half‑onion on the sting and leave it on for a few minutes.
• Use special sting heaters. Sting‑heater pens available in pharmacies generate controlled heat to deactivate the proteins in wasp venom. This method is gentle on the skin and avoids burns that could occur with a hot spoon.
• Apply gel from a fresh aloe vera plant to the affected area. It soothes the skin and reduces inflammation and can be applied several times daily if needed.
• Proven home remedies such as a sliced onion or a paste of baking soda and water can help reduce swelling and relieve itching.
• Although tempting, scratching the sting can lead to skin irritation and infections. Instead use a cooling gel or ointment to relieve the itch.
• If you wear rings, bracelets or other tight items near the sting site, remove them quickly as swelling may occur.
• A cotton pad soaked in vinegar can disinfect the area and at the same time relieve itching.
• Ointments with hydrocortisone or chamomile extract can help reduce inflammation and discomfort. Apply a thin layer to the sting and repeat as needed.
• A cooled chamomile tea bag is soothing to the skin and can reduce swelling. Simply place it on the sting for a few minutes.
• Watch for allergy symptoms. If symptoms such as breathing difficulties, nausea or swelling all over the body occur, call emergency services immediately. These may indicate an allergic reaction.
• Outdoors, coffee grounds that are lightly lit can repel wasps by their smell. The smoke drives away the insects and thus protects from possible stings.
• If you see a wasp, remain calm and do not swat at it. Agitated movements may irritate the wasp and cause it to sting.

Wasp stings can be unpleasant but are usually harmless and heal without complications. It is important to stay calm, cool the sting site and remove the stinger carefully. Allergy sufferers should be especially cautious and seek medical help quickly in an emergency.