My age is 27 and I am software engineer actually I have yawn problem from 4-5 years. I always feels yawn and continue I do some time I have to do whole day some time 1 hour a day and some time they away. But not couple of days I am having fullness in frontal mind like some one is pressuring on top of head. And whole day yawn please let me know what this issue can be? And what medicine will help.