an injection of collagen into the lips or skin to make the lips appear larger or the skin appear younger and smoother

Collagen implants don't help the blemishes left by chicken pox or acne.

Facial procedures such as collagen implants are extremely popular.

The collagen injection caused her lips to swell terribly.

After numbing the area, the surgeon administered the collagen injection.

Fillers such as collagen injections typically disappear after around three months.