behavioral variation

[eliteniraj]

Hi,

I am writing this in behalf of my father. Lately, i have started observing some behavioral changes in my father. I find him very active one day and on second day he seems tired, sleeping and not talking to anybody. And again on another day is active. Same cycle continues. This has been continuing for couple of months now. He complains no pain in body or any kind of sickness. He is taking blood pressure medicine right now. I do not know whether this problem is related to neurology or which branch as i am engineer and have little knowledge of medical science.

Please guide me