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What could be the cause of numbness in the upper lip?

Jun 09, 2025 Source: Cainiu Health
Dr. Liu Chao
Introduction
In general, numbness in the upper lip may be caused by various factors, mainly including physiological stimulation, nutritional deficiencies, allergic reactions, trigeminal nerve issues, and insufficient blood supply to the brain. However, please note that the above treatments are for reference only, and the specific treatment plan should be determined by a doctor according to the patient's individual circumstances. If symptoms of upper lip numbness occur, it is recommended to seek timely medical attention for a detailed examination.

Generally, numbness in the upper lip may be caused by various factors, mainly including physiological stimulation, nutritional deficiencies, allergic reactions, trigeminal nerve issues, and insufficient cerebral blood supply. The specific analysis is as follows:

1. Physiological Stimulation

Consumption of spicy or irritating foods, such as chili peppers or Sichuan peppercorns, may stimulate the nerve endings around the lips, causing a numb sensation. Usually, there are no other significant accompanying symptoms, and the numbness may gradually disappear as the food is digested. It is recommended to avoid excessive intake of spicy and irritating foods and maintain a bland diet.

2. Nutritional Deficiencies

Deficiencies in vitamins such as B12, B6, and B1 may affect the normal functioning of the nervous system, leading to numbness. Symptoms may also include facial drooping and drooling. Maintaining a balanced diet and adequate nutrient intake is important for promoting nervous system health.

3. Allergic Reactions

Contact with allergens such as seafood, pineapple, mangoes, or certain medications may trigger allergic reactions, accompanied by lip swelling and itching. Immediate avoidance of the allergen is advised. Antihistamine medications such as ephedrine brompheniramine tablets, terfenadine dispersible tablets, or desloratadine tablets may be used under medical guidance.

4. Trigeminal Nerve Issues

If the trigeminal nerve is damaged, inflamed, or compressed, it may cause numbness in the upper lip. This may be accompanied by numbness or pain in other areas of the face. Under a doctor's guidance, medications such as carbamazepine tablets, phenytoin sodium tablets, or vitamin B1 tablets may be used to promote nerve recovery.

5. Insufficient Cerebral Blood Supply

Cerebral hypoperfusion caused by cerebral artery circulation disorders or carotid artery atherosclerosis may lead to upper lip numbness, which may also be accompanied by headaches, dizziness, vertigo, sleep disturbances, and other symptoms. It is recommended to follow medical advice for treatment with medications such as compound salvia miltiorrhiza tablets, nimodipine tablets, or compound aspirin tablets.

However, please note that the above treatment methods are only for reference. Specific treatment plans should be determined by a doctor based on the patient's individual condition. If numbness in the upper lip occurs, it is recommended to seek timely medical evaluation for detailed examination to enable early diagnosis and management.

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