"It Hurts Me Too" is a blues standard that is "one of the most interpreted blues [songs]. First recorded in 1940 by Tampa Red, the song is a mid-tempo eight-bar blues that features slide guitar. It borrows from earlier blues songs and has been recorded by many blues and other artists.

"It Hurts Me Too" is based on "Things 'Bout Comin' My Way", recorded by Tampa Red in 1931 (OKeh 1637). The melody lines are nearly identical and instrumentally they are similar, although the latter has an extra bar in the turnaround, giving it nine bars. "Sam Hill from Louisville", one of several pseudonyms of Walter Vinson (or Vincson), recorded "Things 'Bout Coming My Way" shortly before Tampa Red (1931 Brunswick 7216). Vinson's version is based on his earlier recording with the Mississippi Sheiks, "Sitting on Top of the World" (1930 OKeh 8784). Both songs share several elements with "You Got to Reap What You Sow", recorded by Tampa Red in 1929 (Vocalion 1404) and by Leroy Carr and Scrapper Blackwell in 1928 (Vocalion 1232). The melody lines, played on slide guitar by Tampa Red and sung by Carr, are similar to those in the later songs. Carr and Blackwell's song has elements of their own earlier 1928 song "How Long, How Long Blues" (Vocalion 1191). "How Long, How Long Blues" has been described as one of the first blues standards and the inspiration for many blues songs of the era.
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http://en.wikipedia.org/wiki/It_Hurts_Me_Too