A dog may briefly lift one lip while investigating a scent or communicating discomfort, but persistent one-sided lip lifting can also accompany dental or facial pain[cite: 17]. Dogs often perform behaviors that look unusual to people but make sense when you consider scent, comfort, communication, learning and health[cite: 17]. The useful question is whether the pattern is familiar and flexible or new, repetitive, painful or associated with other symptoms[cite: 17].
Quick Answer
A dog may briefly lift one lip while investigating a scent or communicating discomfort, but persistent one-sided lip lifting can also accompany dental or facial pain[cite: 17]. Focus on whether the pattern is familiar and flexible or new, repetitive, distressing or associated with other symptoms[cite: 17].
Common Reasons
1. Scent investigation
This possibility fits best when the timing, trigger, and the dog’s body language are consistent with it[cite: 17]. Compare the episode with the dog’s normal routine and look for signs specific to this cause rather than relying on the behavior alone[cite: 17].
2. Social communication
This possibility fits best when the timing, trigger, and the dog’s body language are consistent with it[cite: 17]. Compare the episode with the dog’s normal routine and look for signs specific to this cause rather than relying on the behavior alone[cite: 17].
3. Dental or mouth discomfort
This possibility fits best when the timing, trigger, and the dog’s body language are consistent with it[cite: 17]. Compare the episode with the dog’s normal routine and look for signs specific to this cause rather than relying on the behavior alone[cite: 17].
4. Facial irritation or pain
This possibility fits best when the timing, trigger, and the dog’s body language are consistent with it[cite: 17]. Compare the episode with the dog’s normal routine and look for signs specific to this cause rather than relying on the behavior alone[cite: 17].
Bottom Line
A dog may briefly lift one lip while investigating a scent or communicating discomfort, but persistent one-sided lip lifting can also accompany dental or facial pain[cite: 17]. Focus on whether the pattern is familiar and flexible or new, repetitive, distressing or associated with other symptoms[cite: 17].
