The Spain international went 24 matches without scoring this season before finally ending his five-month goal drought with two goals in Chelsea's FA Cup quarter-final win over Leicester.
"It was a mental block, I felt really bad," he told his website, fernando9torres.com.
"I felt very well on the field this season because I have become a more complete player but the ball did not fall for me and I felt I was never in the correct position.
"I watched many videos to study the movements of other strikers, including mine from my spells at Atletico and Liverpool.
"It helped me a lot because I lost the fear of being in the area. I want to thank Steve Holland (assistant coach) for the work he did to help me.
"There were times where I lost hope and that has never happened to me before.
"It's the worst feeling in the world when you love your profession and I became the player I hate.
"Luckily it is part of the past. Now all I have in mind is to fulfil dreams.
"I fulfilled a dream (by winning the Champions League against Bayern Munich at the weekend) and I'd say it's a very happy moment but I demand more.
"The best is yet to come. Now we have to keep dreaming."