A reader sent in this example of a possible spider bite. He mentioned in his email that this photo was taken one day after becoming aware of the "bite," and he believes that it looks similar to another picture of a brown spider bite.
An expanding lesion like this certainly could be a brown recluse bite, but there are so many other possibilities that there is really no way to determine what the lesion is from unless the victim seeks medical attention. Even if the victim sees a doctor, without a spider there might not be a diagnosis.
Have a spider bite you want to share? Submit a picture of your spider bite.
Want to talk about spider bites? Ask others and see more bites on the First Aid Forum.