What's the significance of black widow spider bite?

Painful muscle spasm: [from dynamed] symptoms of black widow spider bite include muscle rigidity, spasms, muscle cramping, abdominal pain, fever, leukocytosis, dizziness, weakness, thirst, nausea, hypertension, irritability, sometimes shock. Rarely fatal in young kids but often resolves without treatment. Found in dark, damp places, these spiders can be very aggressive if handled and should be given a wide berth!

Agree w Dr. Woods: Black widow spider bites can cause localized pain. This can lead to cramping of muscles in the are of the bite. Or there can be generalized cramping of muscles, nausea, vomiting, abdominal pain, chest pain, difficulty breathing and tremor. If pain is significant or you have generalized body symptoms- seek medical care. For severe symptoms call 911.