lack of oxygen
One day a sick person went to a doctor. Doctor found lack of oxygen in his body.
He asks him, "You lack oxygen in your body. What is your routine?"
The man replies, "I wake up at eight, get ready for my office and go off. Come back in the night, eat and sleep."
Doctor says, "You better wake up early and go to park for some fresh air. After eight, all the oxygen is inhaled by Ramdev and his Chelas."