Toddler had fever of 104.1 should i be concerned about any lasting effects from this?i've heard of hearing loss, organ damage, etc from high fevers.

No: The residual effects quoted are from the underlying conditions of febrile illness. E.G., bacterial meningitis or sepsis (blood poisoning), not from the high fever.

Old wives tales: This has been studied in detail & found to be a only a myth. Progress in identifying causes of hearing loss & identification of genetic issues in learning problems have cut back on the number of issues that were blamed on fever 40-50 years ago.I see at least 1 case of flu yearly with 105-106 in kids who turn out fine. Parents need to pay more attention to a kids fluid needs than the fever.