Allergic reactions to cosmetic lip filler can occur when the body’s immune system responds to the foreign substance injected into the lips. Symptoms of an allergic reaction can include swelling, redness, itching, and pain around the injection site. In severe cases, anaphylaxis can occur, which is a life-threatening allergic reaction that can cause difficulty breathing, a rapid heartbeat, and loss of consciousness. It is important to seek medical attention immediately if you experience any of the