What causes for red face swelling not itchy?

Non-itchy red face swelling can be caused by various factors, including allergic reactions to certain foods or medications, angioedema, or infections such as cellulitis. It may also result from conditions like rosacea or other inflammatory skin disorders. Additionally, environmental factors like sun exposure or extreme temperatures can contribute to swelling. If the swelling persists or is accompanied by other symptoms, it's advisable to consult a healthcare professional.