When we said that some marks and some treatment open or close our Pores, we mean to say that it make it appear open of close cause they always stay the same size, but when they get clogged with sebum, or dead skin cells then they look pretty ugly and deep and large and when massage them away and when we clean them then they look invisible so we just need to clean these pours and we will be actually able to get smaller and clearer skin pours too, so are you ready.
Take a tablespoon of worm milk and mix one teaspoon unflavored gelatin in it and put it in microwave oven for 10 seconds and then mix it well and then apply it all over your face, except your eye brows and your lashes and let it get dry and I think it will take 30-45 minutes to get dry completely and then peel it off, you will see the dead cells and blackheads all over the mask and you will feel your skin smoother and softer afterward.
Next thing that you can use to get rid of blackheads and open pores is a massage of lime and olive oil, you need to take juice of a big lime and add few drops of olive oil in it and apply it all over your face and keep massaging till it get absorbed totally and you can leave it on your face over night to treat all kind of skin marks and pours.
You can use plain tomato mask over your face for a better skin and skin appearance and for that you can keep some tomato slices in your freezers and rub it all over your face to make your pores cleaner and tighter.
Keep your body and your skin clean and hydrated to look and feel fresh and beautiful and if you use green tea three times a day then it will actually keep your skin clean and healthier inside out.
Scrub your face with alum powder/ baking powder/ sea salt/ milk powder/ everyday would not only keep your skin clean and healthy, but it will keep your skin safe from dead cells and blackheads too.
Best of luck