Swelling of the lips can arise due to different conditions. Trauma or injury to the lip and mouth area is an obvious cause of swollen lips. Allergic reactions, either to foods, medications, or other substances, can often be accompanied by swelling of the lips. This may be accompanied by other allergic symptoms, such as hives and itching. Angioedema is a condition in which there is swelling of the tissue beneath the skin, and this is often concentrated around the eyes and lips. Some infections (such as herpessimplex virus infection) can result in blisters (sometimes referred to as cold sores) and localized swelling of the lips. Infections and inflammatory conditions of the skin can also lead to inflammation and swollen lips (cheilitis). Less commonly, medical conditions or illnesses that affect the entire body may cause lip swelling, sometimes in association with fluid retention or swelling in other areas of the body.

When your top lip is swollen, you are likely to experience a number of signs and symptoms. The symptoms could be mild or extreme and they could indicated a number of possible causes. In fact, sometimes, you need to do differential diagnosis of swollen upper lip if you are to unearth the actual cause of the swelling since some share similar signs. The common symptoms include the following:

• Enlarged or fat lip (lip distention)
• Numbness or your lip feels numb
• Pain on your lip
• Tight and dry lip
• Tingling feeling, itchiness, inflammation
• Redness and skin color changes
• Blisters on your lip and chapped lips
• Discharges which might include pus as well as pus filled bumps
• Fever, chills, nasal congestion or runny nose.

This are not the only symptoms. There are many others which are dependent on the actual cause. In case you have symptoms such as too much distress, breathing difficulties, tongue swelling, hives and rash, tight throat and fingernails discoloration (becoming blue), ensure you seek for immediate medical attentions.