This is a very safe procedure in the hands of our highly experienced cosmetic doctors. Common side-effects include redness, swelling and bruising. These usually resolve quite quickly. Dermal fillers can result in some lumpiness which settles easily . Too much filler can result in lengthening of the upper lip which can look unnatural, its there really important to choose an experienced practitioner. These fillers can be broken down with an enzyme injection if required.