pain, vomiting, and dizziness.
[healthcentral.com]
The black widow spider may cause only a mild local reaction at the bite site, but pain, stiffness, chills, fever, nausea, and abdominal pain may follow within a few hours.
[skinsight.com]
Call a doctor if: You have a fever, severe headache, muscle and joint pain, nausea and vomiting, abdominal pain or a red, blotchy rash that starts on your ankles and wrists
[sharecare.com]