how does one concentrate?

Thursday, June 28th - headache is constant and varies in intensity however it is always there! Very annoying and frustrating. How does one concentrate? I feel a throbbing in my gum area; almost a sensation like there is something caught in my tooth so I floss but the sensation is "higher". I relate this to my migraine - my headaches are always on the right side, my right temple and my root canal, gum surgery, dental issue is on the top right side.