What are the symptoms of a spider bite?

Let me explain: Mild stinging sensation when bitten. Slight swelling around one or two small bite marks dull, numbing pain progressing from the bite site to your abdomen and back withen one hour. Severe cramping or rigidity in your abdominal muscles. Generalized, severe pain in your muscles and joints, abdomen or back nausea and vomiting dizziness profuse sweating tremors restlessness and anxiety.