welcome to Healthcare Magic.
From the description, it appear that he may have anxiety
disorder. Anxiety can lead to slight increase in BP, agony and increase perspiration.
It is not necessary to have stress
in life to develop anxiety disorder. In most of the cases they occur due to chemical imbalance (like decrease serotonin in brain).
In his case it is better to get him examined, concurrently with general physician and psychiatrist
. Till that time monitor his BP.
Wish you all the best.
Dr Ashish Kumar Mittal