I've been using a fairness cream for a month now, and my skin has become dull with pimples. My skin was fine before, but after using the cream, it seems to have gotten damaged. What should I do?

It sounds like you may be experiencing a reaction to the cream you have been using. To help improve your skin condition, I recommend stopping the use of the current cream and switching to a gentle cleanser and a non-comedogenic moisturizer. You can also consider using a topical acne treatment containing benzoyl peroxide or salicylic acid for the pimples. Additionally, incorporating a vitamin C serum can help brighten your skin. Remember to always use sunscreen during the day to protect your skin.