Swelling under the nose and above the mouth may be an allergy, may also be a local skin infection, need to be specifically analyzed. 1. Allergy: the swelling of the nose above the mouth may be due to contact with allergens (such as eating seafood, etc.) and lead to allergic conditions, accompanied by rashes, itching and other symptoms, you can take anti-allergy drugs such as loratadine, cetirizine, etc., and drink a lot of water, to observe whether or not it is better, such as the symptoms of persistent aggravation need to be timely medical attention. 2. Local skin infections: folliculitis, boils, carbuncles and other skin infections, such as the infected part is located in the skin tissue above the mouth, will lead to swelling above the mouth, accompanied by local redness, heat, pain and other symptoms, can be applied locally antibiotic ointment, such as fusidic acid cream, etc., such as not get better or aggravation, it is recommended that we seek medical attention in a timely manner, in the guidance of the doctor to the correct treatment. There are various causes of swelling below the nose and above the mouth, it is recommended to consult a doctor in time, targeted treatment.