Every procedure carries a certain amount of risk, even injectable procedures like those involving Botox®, collagen, Restylane® or another type of filler. General risks include pain or infection at the site of the injection(s), although the risk of infection is minimal.

Common risks of Botox treatments are generally short-term and can include headaches, respiratory infections, nausea, and forehead and eyelid sagging. Less common risks can result from the injection itself and include pain, swelling, bruising, bleeding, numbness and weak muscles. "Botox parties," a trend wherein Botox injections are provided in someone's home, can increase these risks, because this and any other such procedure should only be administered in a sterile medical facility by a licensed healthcare professional.

Risks associated with collagen injections include allergic reactions to either the collagen itself (particularly if it's bovine-based) or to the lidocaine contained in liquid collagen, although these risks can be alleviated through an open discussion of the client's medical history before the procedure is performed. Additional risks include redness, swelling or bruising, open sores, itching, abscesses, peeling and scarring.

The risks of Restylane treatment include headaches, nausea, flu-like symptoms, pain, swelling, redness, and itching. Less common side effects include swelling at the injection site and, occasionally, muscle weakness.

Candidates for injectable treatments are urged to discuss the possibility of all risks involved with their physician prior to scheduling a procedure. This will help the individual weigh the benefits versus the risks and make an informed decision about the procedure.