Collagen injections may help erase frown lines, "crow's feet" and nasolabial folds or smile lines. Collagen injections have been around for a while, but have decreased in popularity with the introduction of soft tissue fillers such as Restylane, which can last longer.
Collagen injections are typically performed in the doctor's office. They are most often performed without anesthesia, although the collagen filler itself contains lidocaine, which is a local anesthetic. Collagen is injected with a tiny needle into the skin depressions. Several injections may be needed, depending on the length and depth of the wrinkle. The procedure takes less than an hour.
The points of injection are "scored" by the doctor with a pencil. Your doctor may select numerous injection points for each location slated for treatment. Antiseptic is also applied. Your doctor will then decide on the correct amount of collagen to be used. The collagen filler is injected into the marked points beneath the skin.

You may experience some minimal discomfort from the collagen injection. There may be some swelling and bruising, which typically subsides within 48 hours. The treated area may look red for the first 24 hours, and this may last up to a week.
You can go home shortly after the procedure. The results are immediate and become fully evident within one week.