Lots of doctors recommend a minor surgical intervention in the tissue area affected by the venom, yet the excision could impair the recovery as such and may increase the risk of scarring. The curious fact is that lots of brown recluse spider bites have been reported in parts of America where this species does not live. In the majority of cases medical assistance is not necessary and a bag of ice placed on the bite will do. If discomfort does not cease, you should not postpone seeing a doctor. Although trapdoor spiders are not generally dangerous, some people may experience very strong reactions to the venom, like nausea, vomiting and headaches. In terms of toxicity, the black widow spider has one of the most potent venoms in the animal world: it is actually fifteen times stronger than that of the rattlesnake for instance. It also surpasses the cobra and the coral snake in the effectiveness of the poison. Though death is not usually the outcome of a black widow bite, some dozens of cases have been reported over the last decades only in the United States. Moreover, brown recluse spiders are very likely to be found behind paintings or under desks and tables. Brown recluse spiders are also very special by the way they have the eyes located on the body. Unlike other spider species that have four pairs of eyes, brown recluse spiders have only three: one medianly located and the other two pairs lateral. Presently, there are all sorts of devices that allow people to catch and analyze the spiders that live in their homes so as to find out whether they are poisonous or not. Quality photos or drawings as well as proper descriptions of the species are necessary when trying to distinguish between the various spiders that live so very close to us. The hunting habits are the same regardless of whether we are talking about the hobo spiders that live indoors or out in the fields, gardens and hedges. The worst consequence of a hobo spider bite is the death of the tissue or necrosis; it is due to such a risk that the general opinion considers the hobo spider highly dangerous.