Well, lancing such things is ill advised. You’re just opening the spot for more bacteria to invade.

Generally, your best bet is patience and a product designed for speeding the process along. Most of the OTC remedies use salicylic acid to dry things up.

But, yes, you can exfoliate gently and it may help it go away. If you’re going hard, you might as well lance it, since you’ll be doing the same thing except tearing it open.

If the tissue around the white part is red and/or swollen, definitely don’t lance it. Let your immune system do its work.