What is cause of bipolar and schizophrenia?

Chemical imbalance?

Haven't kept up with professional journals. Last I heard these two mental illnesses remain idiopathic or unknown. Fortunately, both can be treated in varying degree's of success depending on the individual patient and severity.

Sometimes it could be genetics. It could even be like a development disability.

Brain chemistry disorders from numerous possible sources.

Trauma, drug use, genetics..

too many drugs in my case lol

Trauma or a chemical imbalance