Why is your lip jumping on the right side?

A jumping or twitching lip on the right side can be caused by a variety of factors, including stress, fatigue, or muscle strain. It may also be a result of caffeine intake or dehydration. In some cases, it could indicate a minor neurological issue, but persistent twitching should be evaluated by a healthcare professional to rule out any underlying conditions. If it’s accompanied by other symptoms, seeking medical advice is recommended.