Suddenly I feel that I am not interested in anything. Is this depression?

I think you are suddenly not interested in anything. I think it may be that you are in a bad mood recently, because I am not interested in anything when I feel bad. I think most people are like this. Of course, it may also be the possibility of depression, mainly depending on your usual behavior. From this point alone, I don't think it is depression, and it needs to be combined with other characteristics. There are several obvious symptoms of depression: depression, lack of interest in the surrounding things, moping, always feeling that they have no future, no use, no use at all, no use in society; I think slowly, talk little, like a person, and feel that I can't think of anything to say when I talk; Weakening of consciousness brings beauty to actions, makes people feel depressed, dislikes communicating with others, and always has pessimistic and negative thoughts. Depression can be cured if it is found early, and the situation will not be particularly serious. The depression of getting up early will not be particularly serious, just like a sense of loss for a long time, but if it is delayed, it will only get worse. Of course, it doesn't rule out that you overcame the obstacles yourself in the early days. There are many cases of suicide due to depression, which is very terrible, so the disease can't be delayed and may kill you. The symptoms that you are not interested in anything can be said to be related to depression, but I think as long as you judge from other symptoms, in short, if you have the obvious symptoms I mentioned above, I suggest you see a doctor as soon as possible. Whether you are depressed or not, you can't delay anything, can you? The longer you delay, the worse the situation will be.