A dermatologist cortisone injection flattens an active pimple in 24 to 48 hours — dilute triamcinolone acetonide kills the inflammation that gives the bump its volume. At-home, the fastest move is a hydrocolloid patch on a surfaced whitehead: Rael Miracle Patch, Hero Mighty Patch, or COSRX Acne Pimple Master pulls fluid out in 6 to 12 hours overnight. For an under-the-skin pimple, a microneedle patch like Rael Microcrystal or ZitSticka Killa Kit delivers salicylic acid through dissolvable tips. Ice the spot for 10 minutes to drop swelling before applying. Skip toothpaste and alcohol — both burn and trigger more inflammation. Picking turns a 3-day pimple into a 2-week scab and risks post-inflammatory hyperpigmentation that lasts months.