Hi swati,
To treat your skin concern, you may follow these suggestions
Use a mild
Glycolic acid face wash twice daily, you may leave it for few minutes prior to washing face as it will help in reducing acne as well as spots( Aha glow or melawash face wash)
Use
cetaphil moisturiser to keep your face hydrated
Get comedones extracted regularly
Use erytop gel and
adapalene gel only over active acne lesions
To treat pigmentation spots apply
Kojic acid based cream like Kojic daily
Do not squeeze or pick acne as it will lead to scarring and pigmentation
Do not apply steroids for prolonged period without doctor's advise as it can lead to skin thinning and flare up acne
If even after following these suggestions, acne persists then
consult a dermatologist to take a course of oral anti acne medicines
Hope that answers your query. Take care.