Why do I have tinnitus all the time? Any doctor can give me description? Am I using too much mobile device?

Tinnitus may be the result of your brain creating the sensation of high-pitched sound when you lose the ability to hear those frequencies. I'm not aware of any treatment for it other than cognitive therapy to help you ignore it. At night, I use a mechanical white noise generator. Some people prefer apps that can generate sounds like wind rushing through trees, ocean waves breaking, thunderstorms, etc.