It is very difficult and unhealthy to hide serious mental health problems without being noticed, because it may delay treatment, worsen the condition, and have more negative effects on life. But if for some reason you don't want to be exposed for the time being, you may be able to take some of the following limited ways： 1. **Pretend to be normal**: Strive to maintain the basic normality of daily behavior and emotional performance, participate in work, social activities, etc. as usual, and try to avoid the ups and downs of emotions from being clearly noticed by others. 2. **Control emotional expression**: Restrain extreme emotional reactions, such as excessive anger and sadness, in front of others, and communicate and interact in a relatively stable manner. 3. **Adjust the appearance**: Maintain a neat and decent appearance, make people look in a good mental state, and cover up inner exhaustion or confusion. However, this kind of concealment is not a long-term solution, and mental health problems need to be faced up to and properly dealt with after all. It is recommended to seek the help of a professional psychiatrist or psychiatrist, who can provide scientific and effective diagnosis and treatment options to help restore health. At the same time, moderate and frank communication with trusted relatives and friends may also obtain understanding, support and necessary assistance.