Thank you for your query.
As the doctor had suggested depression
earlier, one can have these complaints in depression too. Instead of thinking of other causes it shall be better if you consult the doctor once again who shall take a detailed history and recommend appropriate investigations and further management. Investigatons shall rule out the doubts that have.
I hope I have answered your query to your satisfaction.
Wishing your son an early recovery.
Rajiv K Khandelwal