So, I killed a very large brown recluse that was in bedroom last night, just before I went to sleep (didn't get bit then). This morning, I woke up with a round mark on my hand. There is a red dot in the center, with a small ring of pink around it (slightly raised, sore), and then a ring of purple. It's got to be less than a centimeter around. The only potential symptom is a hot, needley feeling in my hand (may just be placebo since I didn't notice the feeling till after I saw the mark).