Alas, because of the tender nature astringents and other methods to
open the poors typically are painful and do not work. You can
try a VERY dillute mixture of vinegar on a cotton swab several times
a day, and you can also try exposing your labia to sunlight for short
periods to allow them to dry somewhat. Other methods are more
drastic and involve professional assistance, such as laser therapy.
Dr. James