Here’s the scenario: You got a pimple, and instead of waiting for it to go away on its own, or treating it, you popped it. So, how long should it take the SCAR to heal? According to dermatologists at Harvard Medical School, most acne scars and spots should fully heal within TWO MONTHS. And any scar that hangs around longer than that should trigger a call to your dermatologist, ASAP. The reason? Because that spot you thought was acne may have been a cyst or ulcer linked to basal cell carcinoma – one of the most common forms of skin cancer! In fact, doctors say it’s very common for patients to mistake the early symptoms of skin cancer with acne or eczema. But as we always say: The earlier your doctor diagnoses skin cancer, the easier it is to treat. So, if you notice anything unusual on your skin – including an acne scar that won’t go away – get it checked out.