Swelling on one side of the face and not on the other side may be due to periapical inflammation, wisdom tooth pericoronitis, submandibular gap infection, cellulitis of the floor of the mouth, mumps, lymphadenitis, skin allergies and so on.
1. Periapical inflammation: Inflammation of the tissues around the root tip of the tooth will cause persistent pain, aggravated by chewing, and in severe cases, it will lead to abscess, causing swelling on the affected side of the face, so there will be swelling on one side of the face and not on the other.
2. Wisdom tooth pericoronitis: Inflammation around the crown of the wisdom tooth during eruption can also lead to swelling on one side of the face and not on the other.
3. Infection in the submandibular space: mostly from peri-coronitis of the third molar and periapical inflammation of the mandibular molar, the inflammation spreads to the peripheral space, which can lead to swelling on one side of the face and not on the other.
4. Cellulitis of the floor of the mouth: including sublingual, submandibular, and sub-chin interstitial infections, which can also lead to swelling on one side of the face and not on the other.
5. Mumps: Unilateral mumps can also cause swelling on one side of the face and not on the other.
6. Lymphadenitis: submandibular lymphadenitis can also lead to swelling on one side of the face and not on the other.
7. Skin allergy: An allergic reaction to the skin on one side of the face can cause edema, itching, rashes and other symptoms to appear, and the face is swollen on one side and not swollen on the other.
If your face is swollen on one side but not on the other, there may be other reasons, so you need to go to the hospital in time to check and clarify the cause.