If bitten, you should seek medical attention. In the past physicians have mistakenly attributed many spider bites to the brown recluse. In almost all known cases, the bite is now known to be from the Hobo spider, one of the funnel-weaving spiders, which is common to most of Idaho. Although it has a greater tendency to bite and is more aggressive than most, it does not seek out humans. When an insect lands on the sheet platform, the spider runs out, tackles and bites the prey.
Most bites occur when the Hobo gets into bedding or clothing and is trapped next to the skin.
Commonly, the spider is found in crawl spaces beneath homes and around out buildings. The initial bite is not painful, but a hard area appears in 30 minutes. Numbing sensations and dizziness may occur. An expanded reddened area that can be 2 inches in diameter or greater may surround the bite. The area blisters in 15 to 35 hours.