Facial fillers are injectable substances administered to the skin to improve wrinkles and acne scars, according to the Mayo Clinic, improving the skin's appearance without surgery. These fillers include Botox Cosmetic, Captique, collagen, Juvederm, Radiesse, Restylane and Sculptra. While fillers may be different in terms of results, they share common risks associated with this procedure.
According to the American Society of Plastic Surgeons, injectable fillers can cause skin reactions that resemble a skin rash. This may spread across the face and result in itching or swelling. If the rash does not improve, seek a physician's advice to ensure an adverse reaction has not taken place.
Facial fillers are meant to shape the skin's surface, giving it a more rounded appearance. However, some fillers are not fluid enough and can cause "clumping" over time, according to the American Academy of Plastic Surgeons. This can cause skin irregularities that resemble lumps. The Mayo Clinic says the skin can appear irregularly firm or contoured as a side effect of facial filler injection.
Although a filler injection does not require significant breakage to the skin, it does require penetrating the skin's surface. In some instances, this leads to infection at the injection site, according to the Mayo Clinic. Symptoms include swelling or heat at the injection site, redness, fever or sweating. Seek a physician's treatment if the symptoms worsen.
While facial fillers can re-shape the face, this can result in over-correction, according to the American Society of Plastic Surgeons. Over-correction can affect face symmetry by making one cheek look fuller than the other or one side of the face--or even one portion of a wrinkle--look more filled than the rest.