<prompt> Which of following is true about allodynia?HyperalgesiaLoss of sensory sensationsPerception of non painful stimulus as painHyperaesthesia  <response>: Allodynia describes the situation in which a non painful stimulus ,once perceived ,is experienced as painful ,even excruciating . Allodynia refers to central pain sensitization increased response of neurons following normally non-painful, often repetitive, stimulation. Allodynia can lead to the triggering of a pain response from stimuli which do not normally provoke pain. Ref Harrison20th edition pg 2245 