I am Dr Ravinder Sharma ENT surgeon.
On the basis of the information provided it appears that it may be because of the stress
at the work place. Another cause may be a disease of the ear causing this. It may be beecause of the negative air pressure in ear or because of a vascular lesion in the ear. I would advise you for a ENT consultation
I hope this answers your concern. Feel free to contact me if you require more information about it