I was bit on the leg by a brown spider exactly two weeks ago. At first it was just a small red splotch (no bump at all). Then after a 7-9 days it faded away, but now as of about two days ago I've developed a bump on my leg that somewhat resembles a mosquito bite. However, it does not itch. It's just the same size and feels like a knot under my skin. I do not know what kind of spider bit me. I only got a quick glance of a brown spider with a round belly (not a light oval belly like the recluse). So in answer to your question--YES. Mine has done exactly that. I'm so confused by it. I've never had a spider bite that I'm aware of til this. The pain in the first few days was terrible. It felt like I had glass in my leg muscles, and my skin around the bite was clammy for days. Now it doesn't hurt, no temperature difference like before...just a bump...
Depends on the type of spider that bit you. I had a spider bite on my arm once. It itched very badly for several days. I could see something in the center of the bite, but could not get it out. Finally a week later a small black splinter looking thing festered up to the surface of the skin. Once I got it out the wound healed. I could only guess it was a fang from the spider.
I had a spider bite when I was 10. It may sound disgusting but I had to pick off the scab and sqeeze out puss. It never returned again so the main answer you were looking for is no