Look out for are the physical effects of stress such as stomachaches. She added that the picking up of new habits such as thumb-sucking can be another indicator that a child is stressed. Mind Your Body, The Straits Times (Thursday, 7 January 2010)
https://www.nuh.com.sg/wbn/slot/u2995/mediaarticlesjan10/MYB_7Jan10_Preschool%20pressures.pdf