An insect bite is when an insect pierces your skin to feed on blood, which usually results in intense itching. Insects that bite include:
- mosquitoes
- fleas
- ticks
- bed bugs
- sandflies
- some ants (not usually found in NZ).
An insect bite usually produces a red, itchy bump or blister. Sometimes the bites can be painful. Scratching can make it worse. In most cases, insect bites go away on their own after a few days. Occasionally a blister or ulcer (break in the skin) may form, which takes longer to heal, especially if it becomes infected.
A sting is when an insect or invertebrate (eg, jellyfish) injects toxin and painful poison (venom) through its stinger. Examples include:
- bees
- wasps
- spiders
- jellyfish.
A sting usually causes a sharp stinging feeling with pain, redness and swelling in the area. In some people, bee and wasp stings can cause a serious allergic reaction called anaphylaxis.
It requires immediate treatment and urgent medical attention – call 111.
Symptoms of anaphylaxis include:
- swelling around the lips and eyes
- a rash appearing within minutes
- shortness of breath or wheezing
- chest tightness
- severe dizziness or faints
- persistent sneezing or coughing
- hoarse voice
- difficulty swallowing or throat tightness
- signs of shock such as pale skin, rapid heart beat and fainting.
Read more about anaphylaxis.