The 26-year-old had not scored for his country since the World Cup in Qatar and his only Premier League goal in 31 appearances for Spurs was in April before Ange Postecoglou joined the club as manager.
Richarlison suggested he had experienced problems off the field which had contributed to his form but was now seeking to address them.
"I went through a turbulent time off the pitch during these past five months," he told Brazilian newspaper O Globo.
"Now things are a bit more stable at home. People who only had their eye on my money are no longer close to me.
"Things are going to flow now and I'm certain that I will have a good run at Tottenham and will make things happen again.
"I'm going to return to England and seek psychological help, from a psychologist, to strengthen my mind. That's what it is about, to come back stronger."
Neither goalkeeper Lloris nor defender Dier have featured in any of Postecoglou's squads for the first five games of the season - including the League Cup.
Lloris was expected to end his 11-year spell at the club this summer after losing the captaincy to Son Heung-min and his place to Guglielmo Vicario but despite interest from Serie A and Saudi Arabia the 36-year-old remains.
Dier has been linked to several clubs at home and abroad and despite Postecoglou insisting last month the player remained part of the team he has so far refused to pick him.