Hydrocolloid

Hydrocolloid is the absorbent material behind many pimple patches. Originally used in wound dressings, hydrocolloid interacts with surface fluid to create a soft gel within the patch.

On spot-prone skin, a hydrocolloid patch works best on surfaced blemishes — think whiteheads or spots that have come to a head. The patch covers the area while absorbing fluid + helping keep hands away from the spot.

That little cloudy or white area you see on a used pimple patch? That's the hydrocolloid interacting with fluid from the blemish.

Hydrocolloid is not an exfoliating acid or traditional spot-treatment active. Think of it as targeted spot support: cover, absorb + leave the damn spot alone.

For deeper, under-the-skin blemishes, a hydrocolloid patch may have less to absorb at the surface. That's where the rest of your clarifying routine matters.