Apply a hydrocolloid patch like Rael Miracle or Hero Mighty Patch to a surfaced whitehead and leave on for 6 to 12 hours — most flatten overnight. For deeper, under-skin bumps, swap to a microneedle patch (Rael Microcrystal, ZitSticka KILLA) with salicylic acid and niacinamide darts. Ice the spot in 3 to 4 minute intervals before applying to constrict capillaries and pull down redness. A thin layer of 1% hydrocortisone cream for one or two days calms inflammation but can thin skin if used longer. For an event tomorrow and a painful cyst, a same-day dermatologist cortisone injection of diluted triamcinolone shrinks it in 24 to 48 hours.