There is usually a lesion that gets worse and worse. It may turn gangrenous. If a bite gets bad go see a doctor. I've had a friend have one of these turn bad and It was horrible. And it took months to heal leaving huge scars. However most bites do not get bad.

Thank you! I was definately bit by a spider of some kind and it turned into a very large raised red bump that was painful to the touch and created a rash up my entire arm. The rash has gone away now but there is a large black and blue spot still on my wrist. It seems to be getting better! Thanks for your help!

I got bit in college right on my panty line. I didn't feel it, which is common for BRS bites. You wont feel it for 8 hours. Anyways, it got about the size of a 1/2 dollar and didn't heal for 3-4 months, then about a year later came back open while I was at the beach bc of chaffing walking around and such. That took another 3-4 months. The skin now after about 5-6 years looks like someone burned me. The skin looks really thin and gets tender if I walk around or go running excessively. Anyways mine was only a minor bite and that's how bad it got. I did the care & dressing for it myself, but I went to the doctors and a surgeon and had them look at it. Only b/c I dressed and cleaned it about 7-12 times a day do I have the clean scar I have now...Needless to say I'm freaked out by spiders all around now...I almost had a wreck on the interstate bc I saw one on my seat....lol Hopefully you'll never get bit Good luck

The majority of spiders found in the U.S. are harmless. There are two notable exceptions, the black widow spider and the brown recluse spider, which are both dangerous to humans. Bites from most (non-poisonous) spiders cause local redness, irritation, and pain that usually can be treated at home using an over-the-counter pain reliever along with application of cooling packs or a wet cloth to relieve swelling. Rarely, an individual can have an allergic reaction to a spider bite, even to a bite from a non-poisonous spider. The black widow and brown recluse spiders are more common in the southern states of the U.S. They prefer warm, dry climates and undisturbed areas such as basements, closets, woodpiles, attics, or under sinks. The black widow spider is a small, black, shiny spider with a red hourglass marking on its belly. The brown recluse spider is sometimes termed a “violin spider.” It is about an inch long and has a marking resembling a violin on the upper part of its back. Bites from both the black widow and brown recluse spiders are dangerous to humans and require prompt emergency medical care. A black widow spider bite is said to feel like a pinprick, although victims may not realize that they have been bitten. Sometimes double fang marks may be seen at the location of the bite. The most common localized symptoms of a black widow spider bite are immediate pain, burning, swelling, and redness. The bite of a brown recluse spider leads to a mild stinging, followed by local redness and severe pain that usually develops within eight hours but may occur later. Some reports of brown recluse bites describe a blue or purple area around the bite, surrounded by a whitish ring and large red outer ring in a "bull's eye" pattern. A fluid-filled blister forms at the site and then sloughs off to reveal a deep ulcer that may turn black Generalized symptoms of bites from black widow and brown recluse spiders may include fever, nausea, vomiting , headache, abdominal pain, joint pain or stiffness, overall feelings of malaise, rash, and muscle cramping or tension. While black widow spider bites are hardly ever fatal, rare deaths have occurred from brown recluse spider bites and are more common in children than in adults. If you are bitten by a spider: Wash the site of the spider bite well with soap and water. Apply a cool compress or ice pack over the spider bite location. Over-the-counter pain relievers may be used to relieve symptoms. (Remember, do not give aspirin to children; use acetaminophen or ibuprofen instead). Call the doctor or seek emergency treatment if the victim is a young child, if you think the bite may have been from a black widow or brown recluse spider, if any signs of an allergic reaction occur, if the bite area becomes infected, or if the victim develops a rash or severe illness. If you are bitten by a black widow or brown recluse spider: Wash the bite area with soap and water. Elevate the area to prevent spread of the venom. Tie a snug bandage above the area (if on an arm or leg) to further reduce spread of the venom, but do not make the bandage so tight as to cut off blood circulation. Always seek immediate emergency medical care. An anti-venom medication is sometimes given for black widow spider bites. Doctors use different types of medications to treat spider bites, including pain relievers, muscle relaxants, and/or corticosteroids. Sometimes hospitalization is required after black widow or brown recluse spider bites. http://www.medicinenet.com/script/main/art.asp?articlekey=61266