chinese medicine bipolar disorder

Mental illnesses regarding Chinese medical science?
I wondered today how western medicine attends just symptoms of diseases, but the “source” where this problem is coming stays in the dark (for example my uncle had really bad back pains and hi got strong muscle relaxants, when all hi needed after all was to lose weight and exercise more). As chinese/Vedic medicine goes to the root of the problem, how they deal with mental illnesses such as schizophrenia, bipolar disorder, concentration disorders and such? How are they treated in there and what causes these?
The cause(s) of Bi-polar disorder and the various types of schizophrenia are not known to medical science so it is impossible to “get to the root of the problem” since the root is unknown. I think western medicine is more informed about the treatment of these disorders and that chinese medicine probably is not as effective. I’m sure that if they had a better cure rate western medics would pick up on why this is.