The follicle opening is completely blocked with sebum and dead skin cells, which is what you see as a whitehead. 卵泡开放是皮脂和死皮细胞完全阻断，这是你看到的白头。
Like a dam that cannot hold any more water, the follicle may eventually rupture, spilling its contents into the skin layers below. 就像一个大坝，不能持有更多的水，卵泡可能最终破裂，泄漏到皮肤层以下。
