Various stages of spider bites

Written by shae freeman
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Various stages of spider bites
Spiders only attack when they feel threatened. (Brand X Pictures/Brand X Pictures/Getty Images)

The thought of being bitten by a spider causes fear in many people. Although spider bites can range from being very mild to very severe and venomous, spiders don't usually attack unless they feel threatened. Cause for concern over a spider bite will depend on the person's possible allergic reaction, or if the spider who bites is a dangerous species such as a black widow or brown recluse. As with many stings or bites, the irritated skin goes through phases of injury until it heals. In cases of spider bites from spiders such as a brown recluse, this process can be very dramatic and sometimes hard to watch.

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Initial Symptoms

Once bitten, the person may not even be aware that it took place. If anything is felt, it is normally just a stinging sensation. A blister may appear at the site of the bite with swelling around it. As time passes, the swelling increases as does the pain. In some rare cases at this stage, a bitten person may feel restless or have chills, fever, nausea, vomiting or may even go into shock. The characteristics of the bite over time will show the signature red, white and blue sign.


As the venom of the spider bite does its damage, the site of the bite begins to develop a very painful deep wound. The venom that originally causes the irritation and swelling of the surrounding tissues also causes necrosis (or tissue death) to occur. The wound can open into a deep hole into the skin, and depending on the amount of venom that was injected, can cause a very graphic wound that varies in size.

Wound Healing

The result of a brown recluse spider bite can be psychologically traumatic by the time it does the most damage that will occur. The dead skin that remains on the body at the bite location will begin to slough off. This area will remain sore, and depending on the severity, will be prone to infection and other secondary concerns. Healing can take anywhere from a week up to eight weeks.


In some cases, depending on the severity of the spider bite, scarring may remain once the actual bite itself has healed. In some more severe cases where surgery was necessary, scarring may also be a result from treatment of the bite.

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