Typical side effects include temporary redness, swelling, blanching, bruising, firmness, tingling, stinging, tenderness, cramping, aching, itching, or skin sensitivity, and sensation of fullness in the back of the throat after submental or submandibular area treatment. Rare side effects may also occur. Paradoxical hyperplasia (visibly enlarged tissue volume in the treated area) may develop 2 to 5 months after treatment and requires surgical intervention for correction.