Cover a surfaced whitehead with a hydrocolloid patch overnight. Hero Mighty Patch, COSRX, or Starface Hydro-Stars flatten the bump in 6 to 12 hours by absorbing fluid through osmosis. Wash with a gentle cleanser, pat dry, and apply to bare skin. No moisturizer or serum underneath — that kills the seal. For an under-the-skin cyst with no head, a microneedle patch like ZitSticka Killa pushes salicylic acid and niacinamide into the bump. Skip squeezing, toothpaste, ice, and alcohol. They inflame the spot more than they shrink it. Peel in the morning when the patch turns opaque white.