Torres has suffered with a succession of injuries in 2010, and he had looked a shadow of his usual self during Spain's World Cup triumph, but he scored his first Liverpool goal since April last weekend and then added a brace for his country on Friday. He had scored just once for Spain in the previous 12 months.
Liverpool boss Roy Hodgson had requested that Torres was allowed to rest during the international break, but Del Bosque feels his performance in Liechtenstein will only be beneficial for the player.
"He didn't score during the World Cup, and these goals plus the one he got the other day for Liverpool are going to improve his morale and self-confidence," he said. "That's very good for him and the national team."
Torres was substituted in the 54th minute but, although he is still some way from peak fitness, Del Bosque insists he only made the change to give his replacement, David Silva, a chance.
"I don't think it was too draining a game for the players," he said. "Torres could have continued perfectly. We had people on the bench who ought to play - we had to give them the opportunity. It was for those who were on the bench rather than those that were on the pitch."
Torres said after the game: "I feel better every day after the injury, with more rhythm, and the goals give me a lot of confidence."
Spain take on Argentina in a friendly in Buenos Aires on Tuesday.