Your body is capable of taking care of your scars and they will get lighter with time. However, if you expose them to the sun, their healing process will slow down and the scars will get darker. So, avoid the sun. If it’s essential to go out in sun, use sunscreen to guard your skin and also cover yourself with hat, umbrella, clothes- whatever you can lay hands on.
Acne (acne vulgaris, common acne) is a disease of the hair follicles of the face, chest, and back that affects almost all teenagers during puberty -- the only exception being members of a few primitive Neolithic tribes living in isolation. It is not caused by bacteria, although bacteria play a role in its development. It is not unusual for some women to develop acne in their mid- to late-20s.