Behavioral problems in the elderly population as in your father needs a detailed history taking and certain investigations. Dementia is very common at this age but in moderate to severe cases, behavioral and psychological symptoms also start showing. A trained psychiatrist in geriatrics will be able to decipher the root cause for such a behavior and treat him accordingly. So I suggest you to consult a psychiatrist as soon as possible.

Hello. Considering your father's age and symptoms, he most certainly needs to be seen by a psychiatrist. There is treatment for all the problems you mentioned and the problem would need more exploration.

Your description indicates likely Dementia. Your father will need a comprehensive assessment to know the nature of the problem, to determine underlying cause, and to plan appropriate treatment. We need to rule out other conditions too, like any underlying physical health condition or depression, psychosis etc. It is important to arrive at the diagnosis at the earliest and start appropriate treatment to prevent further deterioration. If it is dementia, there are effective medicine to slow down dementing process and to control behavioral symptoms. Please consult a psychiatrist as soon as. He needs to be seen in person. Regards