Well, i know what you are hinting at , well i did think of a probable psychotic diagnosis , but , the fact that in severe depression one may develop psychotic features , which is called as Depression with psychotic features in which a person may sudenly break into laughing spells or crying spells without any reason, also one may attribute getting energy from a different source or having other bizarre thoughts, but in order to have him considered as having frank psychosis
( which is seen in schizophrenia
or schizoaffective disorder
disorder), he needs to have consistent hallucinations ( but ,he does not hear non existent voices ) , delusions ( that is a false firm belief in something which is held on inadequate grounds , and cannot be shaken on the basis of any evidence or rationale given to the patient , he does not have this either) , lack of insight( that is awareness of oneself and his surroundings) , and impairment of reality testing . Well, he does not have these sympeoms , does he.
Also, you have mentioned , he is intelligent , although does not like to venture out , but when he is pushed by you people to go out , he does that in a very normal way as anyone of us would do it, he watches news , meaning that he is well aware of his surroundings , which rules out lack of insight and loss of reality testing, also the laughing which he sometimes exhibits is probably because of his thoughts provoking it , which are muddled in case of a depressive patient .
So, although , i cannot rule out onset of psychotic illness , as that would only be confirmed on the basis of Mental state examination that requires one on one meeting with a psychiatrist , but on the basis of history that you have presented , it seems that he is most likely suffering from Major Depressive disorder
(MDD) , probably with psychotic features.
So, i suggest he needs to be physically examined by a psychiatrist , so that he diagnosis is confirmed and his treatment gets started .
I hope this helps clearing your doubts.</p><p> </p><p>Please press te ACCEPT button if you are satisfied with the answer , as only then will i be credited for my service.