The two most common poisonous spiders found in the United States are the black widow and the brown recluse. Black widow spiders have fangs. Usually you can see two small puncture wounds after being bitten by a black widow spider. Symptoms that can result from a black widow bite include severe and intense pain, stiffness, muscle cramps, abdominal cramps, back pain, excessive sweating, and hypertension. If you have confirmed that the bite was from a black widow spider, initiate treatments include:
Wash the area with mild soap and water and use ice applications or a cold cloth to help prevent swelling.
Do not apply ice directly to the skin. Use a towel or soft and clean cloth between the skin and the ice-filled baggie or cold pack.
Elevate the area that was bitten if possible and practical.
Take an over-the-counter product to help with pain and/or inflammation such as acetaminophen, ibuprofen, naproxen, or aspirin. Be sure to follow the directions on the label.
Then go to seek immediate medical care.