For oily skin, the most effective spot treatments contain active ingredients like Salicylic Acid or Benzoyl Peroxide. Salicylic acid (1-2%) is oil-soluble, meaning it penetrates deep into pores to dissolve excess sebum. Alternatively, a thin layer of 2.5% Benzoyl Peroxide gel works excellently to kill acne-causing bacteria and reduce inflammation quickly. For healing post-acne marks, gels containing Adapalene or Niacinamide are highly effective. Always choose gel-based, oil-free, or non-comedogenic formulations to avoid clogging your pores. Apply these treatments only to the affected spots, and consult a dermatologist if your acne worsens.