A little localized numbness of the skin of the right lower lip may be caused by diseases such as labiitis, facial nerve palsy, transient ischemic attack and so on. 1. Lipitis: If the patient is intolerant to irritating foods, such as chili peppers, mustard, onions and so on, it may lead to the occurrence of lipitis. After inflammation releases histamine, bradykinin, pentazocine and other vasoactive substances, it is easy to cause localized redness, swelling and numbness of the lip skin. 2. Facial nerve palsy: If the patient suffers from facial nerve palsy, it can lead to numbness in the face innervated by the damaged facial nerve, causing localized numbness in the skin of the right lower lip, while the patient is also accompanied by shallow nasolabial folds, crooked corners of the mouth and other symptoms. 3. Transient ischemic attack: transient cerebrovascular circulatory disorders caused by various reasons, so that the local cerebral tissues are ischemic and hypoxic, which can easily cause one side of the body movement disorders and sensory abnormalities, and so on, and may appear right lower lip skin numbness. If the patient appears right lower lip skin localized a little numbness of symptoms, it is recommended that he or she go to the hospital in time to improve the relevant examination, to clarify the cause of the disease, and follow the doctor’s instructions for treatment.