Hello. Thank you for writing to us at healthcaremagic. You have a dual concern of acne and pigmentation/scaring. Pore size is genetically determined and large pore size is due to overactive and large sebaceous glands thus causing oily skin. Pore size, oily skin ad acne are all related. Acne is frequently complicated by pigmentation also known as post-Inflammatory hyperpigmentation (PIH)/ acne scaring. Pigmentation (PIH) is more common in skin of color and is nothing but a non-specific reaction to any inflammatory insult of skin, inflammatory acne being one of the cause. For acne, I would suggest a combination of oral and topical antiacne treatment. Oral antibiotics like doxycycline, minocycline and azithromycin are useful for treatment of inflammatory acne lesions i.e acne that is red, painful and pustular. Topical antiacne treatment is part of the overall treatment of acne and includes either benzoyl peroxide gel Or clindamycin gel for day time application and either topical adapalene gel or azaleic acid for night time application. Adapalene as well as Azaleic acid belong to a class of topical retinoids and are an essential part in the treatment of acne. Since your concern is pigmentation apart from acne, therefore, I would prefer azaleic acid instead of adapalene at night. Azaleic acid is comedolytic, antiinflammatory as well as lightens post acne hyperpigmentation resulting from acne. Rather than trying OTC products I suggest you to visit a dermatologist in your region for a complete assessment of the severity of your skin problems and appropriate treatment. You may also opt for a few sessions of chemical peeling from your treating dermatologist. Salicylic acid peel is quite good for acne whereas glycolic acid peel works well for pigmentation. Regards