My 70 year old friend has been suffering from unexplained episodes of severe agitation where he fixates on something . His whole personality changes and he becomes physically and verbally aggressive. In between these episodes he is totally lucid although he talks quickly and excitedly.
An example is the other day he went for a walk with a walking club and us . It began to rain heavily . He got very agitated . He wouldn't move and just kept trying to rub off the rain saying he wanted to be clean . He was shouting at his wife abusively. As if blaming her for the rain . Though it might have been for bringing her out in it . When the episode was over he was telling me all about his life and appeared lucid again . He thanked me during the episode for my help but also seemed in a trance .
My friend has had mri scans of the brain . No cause found . Dementia has been ruled out .
I thought very late onset schizophrenia. I have no psychiatric training but have cared for people with schizophrenia. And I joined the dots from there . I wondered if anyone had any ideas what this could be please . His family are at the end of their tether