Background: Transcranial direct current stimulation (tDCS) is a brain stimulation technique that has been emerging as a promising tool for the clinical management of pain. It has been shown to raise pain threshold when primary motor cortex (M1) or dorsolateral prefrontal cortex (DLPFC) are stimulated. Chronological age is associated with great variation of neural plasticity, however studies comparing the effect of tDCS in different ages are scarce.