Thanks for the query.
Dont worry the drug reactions dont leave much scarring.
The lesions are superficial and heal very soon.
Even if there is some pigmentation,
You can use skin lightening creams to remove it.
Also use a sunscreen daily.
Please meet a dermatologist
and discuss regarding this.
Let me know if you have any other doubt.
you can ask a direct question to me on this forum, following the below link.
Wishing you a good health.