Can red tide affect your brain?

Exposure to other neurotoxins can result in harmful effects on the brain in mammals. Memory impairment, epilepsy, dementia, neuropathy, and/or myopathy are common manifestations of neurotoxin exposure.

The waters does not turn red immediately during red tide and it is hard to distinguish right? That made me warry. Maybe that is one of the reasons why some people already have brain damage without knowing they already swam in an infected sea before.

Yes and it is not obvious at first. When exposed to toxins from red tide, there is a possibility of memory impairment, epilepsy, dementia, neuropathy, and/or myopathy. These are common manifestations of neurotoxin exposure.