Hello and welcome to healthcaremagic
Severe acne commonly leave behind
post acne hyperpigmentation as well as post acne scars. For post-inflammatory hyperpigmentation, you could use a skin lightening cream containing one or more of the following ingredients like Azaleic acid, kojic acid,
hydroquinone etc to gradually fade away the hyperpigmentation.
An Oral Vit C once daily would help in hasten up the resolution of hyperpigmentation.
For acne scars various procedures can be performed to improve the cosmetic appearance of acne scars e.g Chemical Peeling, Fractional CO2 Laser, Microneedling/
Dermaroller, Subscission, Punch excision and grafting,
Dermabrasion etc.
I would advice that you see a
dermatologist for a proper assessment of your acne scars and appropriate procedure to benefit your acne scars.
You could use a gel based broad spectrum sunscreen, that which offers both UVA and UVB protection, throughout the day.
regards