 Acute pain: is of sudden onset and is usually the result of a clearly defined cause such as an injury. The acute pain includes the estimated time as necessary so that the tissues heal, as described by John Bonica in 1953, usually in the span of a month, according to the Committee of taxonomy of the pains of IASP, the length limit for a sharp pain is three months, however should be noted that there are authors who continue classifying pain acute with a duration of up to 6 months. 