Some things have remained fashionable and classic for ages, though, like a good red lipstick.

But the lips on which we apply that lipstick are changing.

While hyaluronic acid plumps lips by encouraging the lips to retain water, collagen fills the lips by itself.

A gloved hand injecting filler into a woman’s lips

So what happens when a real person gets these injections?

She also experienced bruising for several days that she had to cover with makeup.

She also said her lips seemed more “puffy” than full.

A gloved hand injecting filler into a woman’s lips