Dear Wei Hua I am sorry to hear that you are not feeling well.Now i am give you some advice. Work hard merely but not making the best use of one's time taking exercise, this is harmful to your health. I suggest that you ask a sharpening to take exercise , take the spirit being able to enhance your physical constitution and Restores your spirit. Have had the strong body, your ability insists on a job but does not feel tired. Best wishes to you!