Those convulsions, you'll see, are often due to "teething worms," which I do not want to google.
They also may follow bowel troubles, if you believe Dr. Holt, and millions did.
"Irritations of the bowels and stomach, picking of the nose, ill-smeling breath, colic, diarrhea, vomiting, disturbed sleep" - probably worms. "In the majoirty of cases theworms can be found in the stool or in the anus."
Happy hunting, Mom!