Facial swelling and discomfort may be caused by allergies, mumps and other reasons. 1. Allergy: Puffiness and numbness in the face due to poor blood circulation in the skin tissues caused by contact with allergic substances, such as seafood and pollen. 2. Mumps: Inflammation of the parotid gland due to parotid virus or streptococcal infection, resulting in swelling and pain. It may be accompanied by fever and headache. When facial swelling and discomfort occurs, it is recommended to consult a doctor in time, follow the doctor’s instructions for further examination, clarify the cause with the help of the doctor, and carry out targeted treatment or therapy.