Other systemic reactions to spider bites include leg cramps, leg numbness, headaches, pulse changes, exhaustion and more, they are all serious enough to determine one to call the doctor right away. Hence, do not hesitate to do so in case you experience any of the above symptoms! Many of the ointments prescribed for the alleviation of the pain caused by a spider bite are often ineffectual. If you suspect to have been bitten by such a spider, it is good to keep a close watch on how the condition of the affected area evolves. There should be no pain felt at the beginning, as reactions only appear within two or up to eight hours after the bite. Contact the doctor immediately should there be any increased discomfort, and do not let the bite untreated if its condition gets worse! 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. Nevertheless, it is worth mentioning that necrosis is very rare and almost accidental, since it appears in very special cases when the immune system of the victim is already impaired. 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. Surprisingly enough, the death risk is a lot lower with this species; the explanation for this queer fact lies in the shy nature of the brown widow spider that injects venom timidly unlike the black widow. One common way to detect the presence of the brown widow spider is by identifying its egg sac. This is a peculiarity of the species, completely different from that of other widow spiders. More likel scorpions, the camel spider is part of an arachnid order known as the solifugae; they live in arid hot climates, including deserts from both the Northern and the Southern hemispheres. There are even some camel spider species with a more special habitat: they live in forests and in grassland.