Apply a microneedle patch like Rael Microcrystal Spot Cover or ZitSticka Killa Kit for at least 2 hours, ideally overnight. The self-dissolving cones deliver salicylic acid 2% and niacinamide 2 to 5 mm into the skin, where the inflammation actually lives — past the stratum corneum a flat hydrocolloid dot cannot cross. Soften the area with a warm compress for 10 minutes first; it improves dart penetration. If the spot starts to surface, swap to plain hydrocolloid (Rael Miracle Patch, Hero Mighty Patch, or COSRX Acne Pimple Master) overnight to finish the job. For a painful cyst with a deadline in 72 hours, a dermatologist Kenalog injection shrinks it in 24 to 48 hours.