The bubonic plague was the disease that caused the Black Death, which killed tens of millions of people in Europe, in the Middle Ages. Symptoms of this disease include coughing, fever, and black spots on the skin.
In most cases, baby acne will go away on its own within three weeks to three months. If after three months the baby acne shows no signs of improvement, parents should point out the acne at their child's wellness visit to see if there is an underlying skin condition that needs to be addressed.
Scars take a long time to heal. Generally, they take about 1-2 months to heal. However, acne scars usually take 1-2 weeks to fade. You cannot touch the scar, or else it will most likely cause an infection and it may never go away. If this happens to you, I recommend seeing a local plastic surgeon if you want to go that far. Also, keep the scar in coldness for as much as you can.