"A Headache Tomorrow (Or a Heartache Tonight)" is a song written by Chick Rains, and recorded by American country music artist Mickey Gilley. It was released in January 1981 as the second single from the album That's All That Matters to Me. "A Headache Tomorrow (Or a Heartache Tonight)" was Mickey Gilley's eleventh number one hit on the country chart. The single stayed at number one for a single week and spent a total of twelve weeks on the country chart.