Swollen lips without pain and itchy consider the emergence of urticaria, angioneurotic edema and other diseases. 1. Urticaria, if contact with irritating substances or changes in the living environment, may lead to urticaria, so there will be swelling of the mouth without pain and itching symptoms, but also may lead to the emergence of air masses, erythema and other symptoms. 2. Angioneurotic edema, some patients with angioneurotic edema, the most typical symptom is subcutaneous tissue or mucous membrane edema painless and itchy, but also may appear skin color change symptoms. If there are obvious symptoms of lip swelling without pain or itching, it is best to consult a doctor in a timely manner, usually need to rest appropriately, relax the mind.