Why did a hard ball come out of my pimple?

That hard ball is usually a hardened plug of sebum (skin oil) and dead skin cells that built up inside the pore. Over time, the plug can dry and firm up, so it comes out feeling like a small bead or kernel. In some cases, a hard white bump is a milium, a tiny keratin cyst, or part of a deeper cyst. Squeezing can push debris deeper and lead to scarring, so let it be when you can. Keeping pores clear helps stop plugs from forming. Try Green Energy Clarifying Toner with salicylic acid and a weekly Volcano Mask. Read what are these bumps on my face and see a dermatologist if lumps return.