hi nitesh thanks for your query on healthcaremagic forum. The problems you are talking about are Acne , Blackheads , dilated pores and scars after healed acne. Typically, people with oily skin tend to have enlarged pores that secrete excess oil, or sebum. Larger pores are also more likely to get clogged with dead skin cells, dirt, and bacteria. Dermatologists generally treat acne-related conditions with topical antimicrobials that help disinfect the skin, and topical retinoids to help unclog pores and prevent white or blackheads from forming. For more moderate or severe cases of acne, an oral antibiotic like erythromycin, tetracycline, doxycycline, or minocycline may be prescribed. The fact is you can’t get rid of your pores, or even shrink them, but you can cleanse and care for your skin in ways that make pores less visible. And that includes staying out of the sun as too much sun exposure reduces the amount of collagen in our skin, and that also causes pores to expand. Laser Treatment for the scars of acne as well as pigmentation may be helpful to you as well .(Fr Erb Glass Laser). Avoid oily foods and oily cream applications on your face and have plenty of water. God Bless