Spider bites are usually harmless, and spiders don't usually bite unless threatened.
Spider bites can cause redness, pain and swelling, or you might not notice them at all. Many other bug bites and skin sores cause redness, pain and swelling. So unless you actually saw a spider bite you, it's difficult to be certain that your wound was caused by a spider.
Worldwide only a few species of spiders have fangs long enough to penetrate human skin and venom strong enough to hurt ...
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Typically, a spider bite looks like any other bug bite — a red, inflamed, sometimes itchy or painful bump on your skin — and may even go unnoticed. Harmless spider bites usually don't produce any other symptoms.
Many skin sores look the same but have other causes, such as a bacterial infection.
Bites from some spiders, such as widow spiders and recluse spiders, might cause serious signs and symptoms. Widow spider bites Signs and symptoms of a widow spider bite can inclu...
Severe spider bite symptoms occur as a result of the venom that the spider injects. Symptom severity depends on the type of spider, the amount of venom injected and how sensitive your body is to the venom.
Most spider bites usually heal on their own in about a week. A bite from a recluse spider takes longer to heal and sometimes leaves a scar.
First-aid treatment for spider bites includes the following steps:
For pain and muscle spasms, your doctor might prescribe pain medicine, muscle relaxants or both. You might also need a tetanus shot. Black widow antivenom If a black widow bite is causing severe pain or life-threatening symptoms, your doc...
Spiders usually bite only in defense, when being trapped between your skin and another object.
To prevent spider bites:
For informational purposes only and not a substitute for professional medical advice, diagnosis, or treatment.
© Mayo Clinic
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