Why do wasps sting?
By Wespenprofis.ch · Reviewed by:Fachbewilligung Schädlingsbekämpfung VFB-S · Updated: 3 July 2026
At a glance
Wasps sting purely in self-defence — when they see their nest threatened or feel at risk themselves, for instance because they are trapped or swatted at. Unlike the honeybee, a wasp's sting has no barb, which is why a wasp can sting several times without dying in the process.
Defence, not attack
A wasp does not sting to catch prey or out of sheer aggression, but to protect itself or its nest. If a nest comes under threat — through vibrations, hectic movements near the entrance hole or an attempt to remove it — the workers raise the alarm and defend the structure together. A lone wasp that feels trapped, in clothing or between fingers for example, will also use its sting as a last resort. Flailing wildly at the insects raises the risk of a sting considerably; staying calm lowers it.
Why they can sting more than once
Unlike the honeybee, a wasp’s sting has no barb. After a sting it slides back out of the skin without difficulty, so the wasp remains unharmed and will sting again if the threat continues. This difference also explains why a disturbed wasp nest can result in several stings to the same person, whereas a honeybee dies after a single sting and leaves its sting behind.
When the risk rises
The risk of being stung is highest in the immediate vicinity of a nest and in late summer, when colonies reach their peak strength and large numbers of workers are foraging at the same time. Encounters at close range are also more common around laid tables outdoors, where sweet drinks or windfall fruit stand uncovered. Anyone who understands that stings are defensive reactions rather than attacks can respond more calmly: keeping away from nests, covering drinks and avoiding hectic movements noticeably reduces the risk. The difference from a bee sting is explained in our guide Bee sting or wasp sting, and more on what these insects feed on in the article What do wasps eat. For a complete overview, see our pillar guide Wasps: the key facts at a glance; for identifying species, use the species overview.
Frequently asked questions
Do wasps sting without provocation?
As a rule, no. A sting is almost always a response to a perceived threat, such as hectic movements close to the nest or pressure on the insect itself.
Can a wasp sting more than once?
Yes. The sting has no barb and does not stay lodged in the skin, so the wasp can pull it out and use it again.
Why do wasps sting more often in late summer?
Colonies are at their largest at that point and the insects compete more intensely for sugar at places where people eat and drink, which makes encounters — and therefore stings — more frequent.