Vaheguru ji Ka Khalsa
Vaheguru ji Ki Fateh, ji
First of all, Im sorry that he is experiencing that. I would suggest to reccomend him to do seva at the gurdwara ji as a daily routine (like washing bhartans, jodheyan di seva etc). Im sure it will help. Tell him to practice Sri Sukhmani Sahib ji and Sri Nitnem Sahib ji daily.. Tell him to try at least, & make sure he does Ardas ji at the end of reading paath. Make sure he practices daya, satya, (full) sucham, bhakti. Bhull chuk maaf kijye!