Pain, in the sense of physical pain, is a typical sensory experience that may be escribed as the unpleasant awareness of a noxious stimulus or bodily harm. Individuals get acquainted to pain through various daily hurts and aches, and occasionally through more serious injuries or illnesses. For scientific and clinical purposes, pain is defined by the International Association for the Study of Pain (IASP) as "an unpleasant sensory and emotional experience associated with actual or potential tissue damage, or described in terms of such damage".