Chickenpox scabs that are accidentally touched off usually do not leave scars, and even if they do, the scars can be lightened and repaired.
After chickenpox infection, herpes will appear all over the skin, and the scabs will fall off during the healing process. If you just accidentally touch off the scabs, as long as you protect the wound and avoid secondary bacterial infections, this situation will not leave a scar.
Chickenpox herpes can leave a scar if you scratch it, leading to a secondary bacterial infection, and then later on, after you have recovered. Even if a scar remains, most scars are very faint and will disappear over time. If you have a scarred body, you can visit a hospital and be given treatment to lighten and repair the scar, which can also be restored with treatment.