Hi, Exposing scars to the sun can cause them to darken and slow the healing process. Before heading outdoors, put on a broad-spectrum sunscreen with a sun protection factor (SPF) of 30 or higher.  Picking leads to more inflammation and injury of your skin, which add to the discoloration and scarring. Squeezing or trying to pop a pimple causes pus and bacteria to filter deeper into the skin, bringing on more collagen damage. Kindly consult Dermatologist....