Generally pores problem is genetic and there is no permanent solution for it. Still if this problem is well taken care of at a young age then it can be stopped then and there. Below are two herbal remedies which stops open pores problem and cure them too.
Using good quality astringent is very important as it tightens the pores. Butter milk holds astringent qualities. Apply it for 15-20 minutes and let it dry. Wash it off with cold water.
Apply egg white on your face for about 15-20 minutes and wash it off with cold water.
Both above remedies have astringent qualities which are great open pores healer. With that if you use Vaseline before going to the bed and wash it off in the morning helps controlling open pores.
So get your pores cured before they become unmanageable. Still above remedies are not giving you any benefit then homeopathy is believed to be a good option.