What causes headache on one side of the head, facial pain, ear pain, and toothache?

Headaches, facial pain, ear pain, and toothaches on one side of the body may be caused by various factors, commonly including trigeminal neuralgia and pulpitis. Trigeminal neuralgia may result from vascular compression of the trigeminal nerve root, causing nerve damage and subsequently triggering symptoms such as headaches, facial pain, ear pain, and toothaches on one side of the body. Pulpitis, on the other hand, is often caused by bacterial infection of the dental pulp, resulting in localized swelling that compresses the trigeminal nerve and potentially causes similar symptoms. Additionally, facial pain might be related to diseases such as herpes zoster or mumps; ear pain could be caused by ear inflammations such as otitis media or external otitis; and toothaches may be associated with multiple dental conditions, including tooth hypersensitivity, dental caries, and gingivitis. These symptoms might be interrelated or exist independently. Therefore, timely medical consultation is recommended to determine the exact cause through professional examination, followed by targeted treatment under a physician's guidance.