Clogged sweat glands
Everybody sweats. Perspiration is actually an important skin function—it helps regulate your body temperature and keep your feet from drying out. However, your sweat glands can become clogged, preventing them from doing their job and leading to discomfort. This issue is called Porokeratosis.
Use salicylic acid or over the counter wart removal liquid on the pore and cover with duct tape and keep covered for 2 days.
Remove duct tape and re-evaluate, if you still feel pain or discomfort wait 48 hours and repeat.