Published on: 5/30/2025
What are the causes of numbness on the left side of the face?
Numbness on the left side of the face can be caused by issues with the trigeminal nerve, problems with the carotid artery, or growths near the brain like epidermoid cysts.
Explanation
Facial numbness, especially on one side, can be due to several reasons. One common cause is problems with the trigeminal nerve, which is responsible for sensation in the face. When this nerve is affected, it can lead to numbness or tingling sensations.
Another possible cause is issues with the carotid artery, which supplies blood to the face and brain. If there’s a problem with this artery, it can affect the nerves and lead to numbness.
Additionally, growths near the brain, such as epidermoid cysts located in the cerebellopontine angle, can press on nerves and cause facial numbness. These cysts are non-cancerous but can still cause symptoms by putting pressure on surrounding structures.
If you experience facial numbness, it is important to speak with a healthcare provider who can help determine the cause and the best course of action.
(References)
- Smith JH, & Cutrer FM. (2011). Numbness matters: a clinical review of trigeminal neuropathy. Cephalalgia : an international journal of headache, 21628435.
- Francis KR, Williams DP, & Troost BT. (1987). Facial numbness and dysesthesia. New features of carotid .... Archives of neurology, 3827688.
- Muzammil S, & Leong KS. (2009). A case of cerebellopontine angle epidermoid cyst .... Southern medical journal, 19373157.
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