Common symptoms of a black widow spider bite include:

• Initial burning pain at the site of the bite
• Swelling around the bite
• Muscle spasms near the bite

Worsening symptoms of a black widow spider bite may include:

• Fatigue
• Headache
• Insomnia
• Muscle weakness (generalized)
• Nausea
• Restlessness
• Severe muscle cramps
• Muscle tremors
• Vomiting

Serious symptoms of a black widow spider bite include:

• Confusion
• Coma
• Drooling
• Excessive tearing
• Excessive sweating
• Severe muscle tremors