Explain the features of a brown recluse spider bite.?

Be seen. Poisonous spider bites generally cause a painful ulcerated area within hours of the bite. If he suspects a black widow or brown recluse spider bite, he should be seen.
Variable. Brown recluse spider's bite can cause no reaction, a mild reaction, an immediate or a delayed reaction. With a significant reaction a which blister appears after bit. The surrounding skin becomes hard, swollen & can be red, white & blue. A deep lesion can develop which can eat through fat and muscle.