After clearing blackheads, you can shrink pores by using skin care products, medication and physical therapy. 1. Use of skin care products: After removing blackheads, you can choose the right cosmetics according to your personal skin, such as skin care products containing salicylic acid and fruit acid, which can improve the keratinization of skin follicles, accelerate the metabolism of the skin, and achieve the purpose of shrinking pores. 2. Medication: You can use retinoids to apply on the skin surface, such as adapalene gel, retinoid cream, etc. to improve follicular keratinization and promote pore reduction, but retinoids have a clear teratogenic effect, so they should be prohibited in pregnancy and preparation for pregnancy. 3. Physical therapy: such as photorejuvenation, fractional laser treatment, etc., can make the pores shrink to achieve the purpose of shrinking pores. After clearing blackheads if you need to shrink pores, it is recommended to consult a professional doctor at a regular medical institution, follow the doctor’s instructions for treatment, do not take medication without authorization to avoid adverse reactions.