Hi, It appears from your query that you are quite worried about open pores. Open pores are nothing but these are much much needed thing to prevent your skin from the recurrence of acne. It is because of the fact that by open pores we have easy flow of oil outside. If these pores were not there then you would have had blockage of pores and recurrence of pimples. We dermatologists very often come across such cases and suggest to use tretinoin (under dermatological supervision) for a long term of period which will help in restoration of pore size as well as will help you in your black and white heads. There is one latest addition of Fraxel Laser which is bit costly but can give you visible result in pores and scars. All the best.