After experiencing a lot of things, I found that my heart did not seem to throb like before, and I lost interest in many things. Why is this so? This was a very common phenomenon known as " mental fatigue " or " mental numbness." When we have experienced many things or experienced a long period of time, our hearts will feel tired and numb. This is because our minds need constant stimulation and challenges to stay active and sharp. But if we keep experiencing similar things, we will gradually lose the freshness and excitement in our hearts, causing our hearts to palpitate and lose interest. Under such circumstances, we need to give ourselves some time and space to rest and recover our inner strength. We can temporarily put down some things or find some new excitement and challenges to re-fill our hearts with vitality and enthusiasm. At the same time, we can also use some psychological techniques to help us recover our inner strength, such as positive thinking, self-affirmation, meditation and exercise. The most important thing is that we need to realize that this is not a disease but a normal psychological phenomenon. As long as we can give ourselves enough time and space, as well as appropriate psychological support and treatment, we can recover our inner throbbing and interest and regain the joy and meaning of life.